The alt-svc cache survives a call to curl_easy_reset fine, but the file
name to use for saving the cache was cleared. Now the alt-svc cache has
a copy of the file name to survive handle resets.
Added test 1908 to verify.
Reported-by: Craig Andrews
Fixes#4898Closes#4902
... so that the subsequent logic below can use a single known define to know
when built on Windows (as we don't define WIN32 anymore).
Follow-up to 1adebe7886
Reported-by: crazydef on github
Assisted-by: Marcel Raad
Fixes#4854Closes#4855
- Removed from global_init since it isn't thread-safe. The symbol will
still remain to not break compiles, it just won't have any effect going
forward.
- make the internals NOT loop on EINTR (the opposite from previously).
It only risks returning from the select/poll/wait functions early, and that
should be risk-free.
Closes#4840
- Copy CURLOPT_SSL_OPTIONS.3 description to CURLOPT_PROXY_SSL_OPTIONS.3.
Prior to this change CURLSSLOPT_NO_PARTIALCHAIN was missing from the
CURLOPT_PROXY_SSL_OPTIONS description.
As detailed in DEPRECATE.md, the polarssl support is now removed after
having been disabled for 6 months and nobody has missed it.
The threadlock files used by mbedtls are renamed to an 'mbedtls' prefix
instead of the former 'polarssl' and the common functions that
previously were shared between mbedtls and polarssl and contained the
name 'polarssl' have now all been renamed to instead say 'mbedtls'.
Closes#4825
... and refer to that file from from CURLOPT_COOKIEFILE.3 and
CURLOPT_COOKIELIST.3
Assisted-by: Jay Satiro
Reported-by: bsammon on github
Fixes#4805Closes#4806
- Add new error code CURLE_QUIC_CONNECT_ERROR for QUIC connection
errors.
Prior to this change CURLE_FAILED_INIT was used, but that was not
correct.
Closes https://github.com/curl/curl/pull/4754
For compatibility with `fwrite`, the `CURLOPT_HEADERFUNCTION` callback
is passed two `size_t` parameters which, when multiplied, designate the
number of bytes of data passed in. In practice, CURL always sets the
first parameter (`size`) to 1.
This practice is also enshrined in documentation and cannot be changed
in future. The documentation states that the default callback is
`fwrite`, which means `fwrite` must be a suitable function for this
purpose. However, the documentation also states that the callback must
return the number of *bytes* it successfully handled, whereas ISO C
`fwrite` returns the number of items (each of size `size`) which it
wrote. The only way these numbers can be equal is if `size` is 1.
Since `size` is 1 and can never be changed in future anyway, document
that fact explicitly and let users rely on it.
Reported-by: Frank Gevaerts
Commit-message-by: Christopher Head
Ref: https://github.com/curl/curl/pull/2787
Fixes https://github.com/curl/curl/issues/4758
The comment was confusing and suggested that setting CURLOPT_NOPROGRESS
to 0L would both enable and disable debug output at the same time, like
a Schrödinger's cat of CURLOPTs.
Closes#4745
This commit adds curl_multi_wakeup() which was previously in the TODO
list under the curl_multi_unblock name.
On some platforms and with some configurations this feature might not be
available or can fail, in these cases a new error code
(CURLM_WAKEUP_FAILURE) is returned from curl_multi_wakeup().
Fixes#4418Closes#4608
Starting with this change when doing parallel transfers, without this
option set, curl will prefer to create new transfers multiplexed on an
existing connection rather than creating a brand new one.
--parallel-immediate can be set to tell curl to prefer to use new
connections rather than to wait and try to multiplex.
libcurl-wise, this means that curl will set CURLOPT_PIPEWAIT by default
on parallel transfers.
Suggested-by: Tom van der Woerdt
Closes#4500
The disable-scan script used in test 1165 is extended to also verify
that the docs cover all used defines and all defines offered by
configure.
Reported-by: SLDiggie on github
Fixes#4545Closes#4587
With the `isdigit` implementation that comes with MSYS2, the argument
is used as an array subscript, resulting in a -Wchar-subscripts
warning. `isdigit`'s behavior is undefined if the argument is negative
and not EOF [0]. As done in lib/curl_ctype.h, cast the `char` variable
to `unsigned char` to avoid that.
[0] https://en.cppreference.com/w/c/string/byte/isdigit
Closes https://github.com/curl/curl/pull/4503
Prior to this change some users did not understand that the "request"
starts when the handle is added to the multi handle, or probably they
did not understand that some of those transfers may be queued and that
time is included in timeout.
Reported-by: Jeroen Ooms
Fixes https://github.com/curl/curl/issues/4486
Closes https://github.com/curl/curl/pull/4489
New option that allows a user to ONLY switch off curl's progress meter
and leave everything else in "talkative" mode.
Reported-by: Piotr Komborski
Fixes#4422Closes#4470
... just say that limiting operations risk aborting otherwise fine
working transfers. If that means seconds, minutes or hours, we leave to
the user.
Reported-by: Martin Gartner
Closes#4469
CURLU_NO_AUTHORITY is intended for use with unknown schemes (i.e. not
"file:///") to override cURL's default demand that an authority exists.
Closes#4349
Double-underscored or underscore plus uppercase letter at least.
... as they're claimed to be reserved.
Reported-by: patnyb on github
Fixes#4254Closes#4255
For a long time (since 7.28.1) we've returned error when setting the
value to 1 to make applications notice that we stopped supported the old
behavior for 1. Starting now, we treat 1 and 2 exactly the same.
Closes#4241
RFC 7838 section 5:
When using an alternative service, clients SHOULD include an Alt-Used
header field in all requests.
Removed CURLALTSVC_ALTUSED again (feature is still EXPERIMENTAL thus
this is deemed ok).
You can disable sending this header just like you disable any other HTTP
header in libcurl.
Closes#4199
Even though it cannot fall-back to a lower HTTP version automatically. The
safer way to upgrade remains via CURLOPT_ALTSVC.
CURLOPT_H3 no longer has any bits that do anything and might be removed
before we remove the experimental label.
Updated the curl tool accordingly to use "--http3".
Closes#4197
This is only the libcurl part that provides the information. There's no
user of the parsed value. This change includes three new tests for the
parser.
Ref: #3794
Added the ability for the calling program to specify the authorisation
identity (authzid), the identity to act as, in addition to the
authentication identity (authcid) and password when using SASL PLAIN
authentication.
Fixes#3653Closes#3790
NOTE: This commit was cherry-picked and is part of a series of commits
that added the authzid feature for upcoming 7.66.0. The series was
temporarily reverted in db8ec1f so that it would not ship in a 7.65.x
patch release.
Closes https://github.com/curl/curl/pull/4186
Repeatedly we see problems where using curl_multi_wait() is difficult or
just awkward because if it has no file descriptor to wait for
internally, it returns immediately and leaves it to the caller to wait
for a small amount of time in order to avoid occasional busy-looping.
This is often missed or misunderstood, leading to underperforming
applications.
This change introduces curl_multi_poll() as a replacement drop-in
function that accepts the exact same set of arguments. This function
works identically to curl_multi_wait() - EXCEPT - for the case when
there's nothing to wait for internally, as then this function will by
itself wait for a "suitable" short time before it returns. This
effectiely avoids all risks of busy-looping and should also make it less
likely that apps "over-wait".
This also changes the curl tool to use this funtion internally when
doing parallel transfers and changes curl_easy_perform() to use it
internally.
Closes#4163
As the plan has been laid out in DEPRECATED. Update docs accordingly and
verify in test 1174. Now requires the option to be set to allow HTTP/0.9
responses.
Closes#4191
If using the read callback for HTTP_POST, and POSTFIELDSIZE is not set,
automatically add a Transfer-Encoding: chunked header, same as it is
already done for HTTP_PUT, HTTP_POST_FORM and HTTP_POST_MIME. Update
test 1514 according to the new behaviour.
Closes#4138
USe configure --with-ngtcp2 or --with-quiche
Using either option will enable a HTTP3 build.
Co-authored-by: Alessandro Ghedini <alessandro@ghedini.me>
Closes#3500
This is done by making sure each individual transfer is first added to a
linked list as then they can be performed serially, or at will, in
parallel.
Closes#3804
Since 7.54 --tlsv1. options use the specified version or later, however
older versions of curl documented it as using just the specified version
which may or may not have happened depending on the TLS library.
Document this discrepancy to allay confusion for users familiar with the
old documentation that expect just the specified version.
Fixes https://github.com/curl/curl/issues/4097
Closes https://github.com/curl/curl/pull/4119
- Escape apostrophes at line start.
Some lines begin with a "'" (apostrophe, single quote), which is then
interpreted as a control character in *roff.
Such lines are interpreted as being a call to a macro, and if
undefined, the lines are removed from the output.
Bug: https://bugs.debian.org/926352
Signed-off-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
Submitted-by: Alessandro Ghedini
Closes https://github.com/curl/curl/pull/4111
The backslash in the character Line Feed must be escaped.
The current man-page outputs the code as following:
fprintf(stderr, "curl_multi failed, code %d.0, mc);
The commit fixes it as follow:
fprintf(stderr, "curl_multi failed, code %d\n", mc);
Closes#4079
Commit 25fd1057c9 made HTTP2 the default, and further down in the
man page that new default is mentioned, but the section at the top
contradicted it until now.
Also remove claim that setting the HTTP version is not sensible.
Closes#4075
Clarify the functionality when built to use Schannel and Secure
Transport and stop calling it the "recommended" or "preferred" way and
instead rather call it the default.
Removed the reference to the ssl comparison table as it isn't necessary.
Reported-by: Richard Alcock
Bug: https://curl.haxx.se/mail/lib-2019-06/0019.htmlCloses#4005
Remove support for, references to and use of "cyaSSL" from the source
and docs. wolfSSL is the current name and there's no point in keeping
references to ancient history.
Assisted-by: Daniel Gustafsson
Closes#3903
As want is size_t, (file->buffer_pos - want) is unsigned, so checking
if it's less than zero makes no sense.
Check if file->buffer_pos is less than want instead to avoid the
unsigned integer wraparound.
Closes https://github.com/curl/curl/pull/3975
- Revert all commits related to the SASL authzid feature since the next
release will be a patch release, 7.65.1.
Prior to this change CURLOPT_SASL_AUTHZID / --sasl-authzid was destined
for the next release, assuming it would be a feature release 7.66.0.
However instead the next release will be a patch release, 7.65.1 and
will not contain any new features.
After the patch release after the reverted commits can be restored by
using cherry-pick:
git cherry-pick a14d72ca9499ff8c1cc36c2a8d520edf690
Details for all reverted commits:
Revert "os400: take care of CURLOPT_SASL_AUTHZID in curl_easy_setopt_ccsid()."
This reverts commit 0edf6907ae.
Revert "tests: Fix the line endings for the SASL alt-auth tests"
This reverts commit c2a8d52a13.
Revert "examples: Added SASL PLAIN authorisation identity (authzid) examples"
This reverts commit 8c1cc369d0.
Revert "curl: --sasl-authzid added to support CURLOPT_SASL_AUTHZID from the tool"
This reverts commit a9499ff136.
Revert "sasl: Implement SASL authorisation identity via CURLOPT_SASL_AUTHZID"
This reverts commit a14d72ca2f.
Added the ability for the calling program to specify the authorisation
identity (authzid), the identity to act as, in addition to the
authentication identity (authcid) and password when using SASL PLAIN
authentication.
Fixed#3653Closes#3790
They serve very little purpose and mostly just add noise. Most of them
have been around for a very long time. I read them all before removing
or rephrasing them.
Ref: #3876Closes#3883
Due to limitations in Curl_resolver_wait_resolv(), it doesn't work for
DOH resolves. This fix disables DOH for those.
Limitation added to KNOWN_BUGS.
Fixes#3850Closes#3857
The time field in the curl_fileinfo struct will always be zero. No code
was ever implemented to actually convert the date string to a time_t.
Fixes#3829Closes#3835
... to make the host name "usable". Store the scope id and put it back
when extracting a URL out of it.
Also makes curl_url_set() syntax check CURLUPART_HOST.
Fixes#3817Closes#3822
Kerberos was incorrectly indented as a subsection under FTP, which is
incorrect as they are both top level sections. A fix for this was first
attempted in commit fef38a0898 but that
was a few paddles short of being complete.
Add the subsections under "Structs in libcurl" to the table of contents.
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Make all struct members under the Curl_handler section
print in monospace font.
Closes#3801
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Introducing the curl bug bounty program on hackerone. We now recommend
filing security issues directly in the hackerone ticket system which
only is readable to curl security team members.
Assisted-by: Daniel Gustafsson
Closes#3488
Commit 9081014 fixed most of the confusing issues between scope id and
scope however 844896d added bad limits checking assuming that the scope
is being set and not the scope id.
I have fixed the documentation so it all refers to scope ids.
In addition Curl_if2ip refered to the scope id as remote_scope_id which
is incorrect, so I renamed it to local_scope_id.
Adjusted-by: Daniel Stenberg
Closes#3655Closes#3765Fixes#3713
Only allow well formed decimal numbers in the input.
Document that the number MUST be between 1 and 65535.
Add tests to test 1560 to verify the above.
Ref: https://github.com/curl/curl/issues/3753Closes#3762
Remove the code too. The functionality has been disabled in code since
7.62.0. Setting this option will from now on simply be ignored and have
no function.
Closes#3654
.. and for Windows also call WSACleanup since we call WSAStartup.
The example is to demonstrate handling the socket independently of
libcurl. In this case libcurl is not responsible for creating, opening
or closing the socket, it is handled by the application (our example).
Fixes https://github.com/curl/curl/pull/3663
The main change here is the timer value that was wrong, it was given in
usecs (ms * 1000), while the itimerspec struct wants nsecs (ms * 1000 *
1000). This resulted in the callback being invoked WAY TOO OFTEN.
As a quick check you can run this command before and after applying this
commit:
# shell 1
./ephiperfifo 2>&1 | tee ephiperfifo.log
# shell 2
echo http://hacking.elboulangero.com > hiper.fifo
Then just compare the size of the logs files.
Closes#3633Fixes#3632
Signed-off-by: Arnaud Rebillout <arnaud.rebillout@collabora.com>
Add support for Ephemeral elliptic curve Diffie-Hellman key exchange
algorithm option when selecting ciphers. This became available on the
Win10 SDK.
Closes https://github.com/curl/curl/pull/3608
From within the timer callbacks. Recursive is problematic for several
reasons. They should still work, but this way the examples and the
documentation becomes simpler. I don't think we need to encourage
recursive calls.
Discussed in #3537Closes#3601
... and remove it from the dist tarball. It has served its time, it
barely gets updated anymore and "everything curl" is now convering all
this document once tried to include, and does it more and better.
In the compressed scenario, this removes ~15K data from the binary,
which is 25% of the -M output.
It remains in the git repo for now for as long as the web site builds a
page using that as source. It renders poorly on the site (especially for
mobile users) so its not even good there.
Closes#3587
The draft-ietf-httpbis-rfc6265bis-02 draft, specify a set of prefixes
and how they should affect cookie initialization, which has been
adopted by the major browsers. This adds support for the two prefixes
defined, __Host- and __Secure, and updates the testcase with the
supplied examples from the draft.
Closes#3554
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
- Pass an empty string to CURLOPT_ACCEPT_ENCODING to use the default
supported encodings.
Prior to this change the specific encodings of gzip and deflate were set
but there's no guarantee they'd be supported by the user's libcurl.
The Kerberos subsection was mistakenly a subsubsection under FTP, and
the curlx subsection was missing an anchor for the TOC link.
Closes#3529
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Commit 7a09b52c98 introduced support
for the draft-ietf-httpbis-cookie-alone-01 cookie draft, and while
the entry was removed from the TODO it was mistakenly left here.
Fix by removing and rewording the entry slightly.
Closes#3530
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Stick to "Schannel" everywhere. The configure option --with-winssl is
kept to allow existing builds to work but --with-schannel is added as an
alias.
Closes#3504
Use an ephemeral port number here; previously the example had 8080
which could be confusing as the common web server port number might
be misinterpreted as suggesting this option affects the remote port.
URL: https://curl.haxx.se/mail/lib-2019-01/0084.htmlCloses#3513
By default WinSSL selects and send a client certificate automatically,
but for privacy and consistency we should offer an option to disable the
default auto-send behavior.
Reported-by: Jeroen Ooms
Closes https://github.com/curl/curl/issues/2262
Add a few missing examples to make `make examples` not leave the
workspace in a dirty state.
Closes#3427
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
When a non-empty list is appended to, and used as the returnvalue,
the list pointer can leak in case of an allocation failure in the
curl_slist_append() call. This is correctly handled in curl code
usage but we weren't explicitly pointing it out in the API call
documentation. Fix by extending the RETURNVALUE manpage section
and example code.
Closes#3424
Reported-by: dnivras on github
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
This adds support for wildcard hosts in CURLOPT_RESOLVE. These are
try-last so any non-wildcard entry is resolved first. If specified,
any host not matched by another CURLOPT_RESOLVE config will use this
as fallback.
Example send a.com to 10.0.0.1 and everything else to 10.0.0.2:
curl --resolve *:443:10.0.0.2 --resolve a.com:443:10.0.0.1 \
https://a.comhttps://b.com
This is probably quite similar to using:
--connect-to a.com:443:10.0.0.1:443 --connect-to :443:10.0.0.2:443
Closes#3406
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
The project bug tracker is no longer hosted at sourceforge but is now
hosted on the curl Github page. Update the FAQ to reflect.
Closes#3410
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Added CURLOPT_HTTP09_ALLOWED and --http0.9 for this purpose.
For now, both the tool and library allow HTTP/0.9 by default.
docs/DEPRECATE.md lays out the plan for when to reverse that default: 6
months after the 7.64.0 release. The options are added already now so
that applications/scripts can start using them already now.
Fixes#2873Closes#3383
This adds the CURLOPT_TRAILERDATA and CURLOPT_TRAILERFUNCTION
options that allow a callback based approach to sending trailing headers
with chunked transfers.
The test server (sws) was updated to take into account the detection of the
end of transfer in the case of trailing headers presence.
Test 1591 checks that trailing headers can be sent using libcurl.
Closes#3350
Only allow secure origins to be able to write cookies with the
'secure' flag set. This reduces the risk of non-secure origins
to influence the state of secure origins. This implements IETF
Internet-Draft draft-ietf-httpbis-cookie-alone-01 which updates
RFC6265.
Closes#2956
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Prior to 7.56.0, fieldnames and filenames were set in Content-Disposition
header without special processing: this may lead to invalid RFC 822
quoted-strings.
7.56.0 introduces escaping of backslashes and double quotes in these names:
mention it in the documentation.
Reported-by: daboul on github
Closes#3361
Forgetting to bump the year in the copyright clause when hacking has
been quite common among curl developers, but a traditional checksrc
check isn't a good fit as it would penalize anyone hacking on January
1st (among other things). This adds a more selective COPYRIGHTYEAR
check which intends to only cover the currently hacked on changeset.
The check for updated copyright year is currently not enforced on all
files but only on files edited and/or committed locally. This is due to
the amount of files which aren't updated with their correct copyright
year at the time of their respective commit.
To further avoid running this expensive check for every developer, it
adds a new local override mode for checksrc where a .checksrc file can
be used to turn on extended warnings locally.
Closes#3303
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Commit 7c5837e792 deprecated the option
making it a manual code-edit operation to turn it back on. The removal
process has thus started and is now documented in docs/DEPRECATE.md so
remove from the TODO to avoid anyone looking for something to pick up
spend cycles on an already in-progress entry.
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
The variable definition had a small typo making it declare another
variable then the intended.
Closes#3304
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
The function does not return the same value as snprintf() normally does,
so readers may be mislead into thinking the code works differently than
it actually does. A different function name makes this easier to detect.
Reported-by: Tomas Hoger
Assisted-by: Daniel Gustafsson
Fixes#3296Closes#3297
Added a few of the more notable milestones in curl history that were
missing. Primarily more recent ones but I also noted some older that
could be worth mentioning.
[ci skip]
Closes#3257
Add the identified issue with --proxy-any and proxy servers which
advertise authentication schemes other than the supported one.
Closes#876Closes#3250
Reported-by: NTMan on Github
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Groff / Troff will display a:
printaf("Errno: %ld\n", error);
as:
printf("Errno: %ld0, error);
when a "\n" is not escaped. Use "\\n" instead.
Closes#3246
The productname from Microsoft is "Schannel", but in infof/failf
reporting we use "schannel". This removes different versions.
Closes#3243
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Similar to how URL decoding/encoding is done, we could have URL
functions to convert IDN host names to punycode.
Suggested-by: Alexey Melnichuk
Closes#3232
APPENDQUERY + URLENCODE would skip all equals signs but now it only skip
encoding the first to better allow "name=content" for any content.
Reported-by: Alexey Melnichuk
Fixes#3231Closes#3231
- for "--netrc", don't ignore the login/password specified with "--user",
only ignore the login/password in the URL.
This restores the netrc behaviour of curl 7.61.1 and earlier.
- fix the documentation of CURL_NETRC_REQUIRED
- improve the detection of login/password changes when reading .netrc
- don't read .netrc if both login and password are already set
Fixes#3213Closes#3224
As has been outlined in the DEPRECATE.md document, the axTLS code has
been disabled for 6 months and is hereby removed.
Use a better supported TLS library!
Assisted-by: Daniel Gustafsson
Closes#3194
MesaLink support was added in commit 57348eb97d but the
backend was never added to the curl_sslbackend enum in curl/curl.h.
This adds the new backend to the enum and updates the relevant docs.
Closes#3195
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Commit 57348eb97d added support for the
MesaLink vtls backend, but missed updating the TLS section containing
supported backends in the docs.
Closes#3134
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
The parameter reference <string> was causing rendering issues in the
generated HTML page, as <string> isn't a valid HTML tag. Fix by back-
tick escaping it.
Closes#3099
Reviewed-by: Jay Satiro <raysatiro@yahoo.com>
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Use TLS vX.Y throughout the document, instead of TLS X.Y, as that was
already done in all but a few cases. Also fix a few typos.
Closes#3076
Reviewed-by: Marcel Raad <Marcel.Raad@teamviewer.com>
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
Use proper Markdown hyperlink format for the Bountygraph links in order
for the generated website page to be more user friendly. Also link to
the sponsors to give them a little extra credit.
Closes#3082
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
- replace tabs with spaces where possible
- remove line ending spaces
- remove double/triple newlines at EOF
- fix a non-UTF-8 character
- cleanup a few indentations/line continuations
in manual examples
Closes https://github.com/curl/curl/pull/3037
- also update two URLs outside of docs/examples
- fix spelling of filename persistant.c
- fix three long lines that started failing checksrc.pl
Closes https://github.com/curl/curl/pull/3036
also:
- fix two warnings in synctime.c (one of them Windows-specific)
- upgrade URLs in synctime.c and remove a broken one
Closes https://github.com/curl/curl/pull/3033
In order for this API to fully work for libcurl itself, it now offers a
CURLU_GUESS_SCHEME flag that makes it "guess" scheme based on the host
name prefix just like libcurl always did. If there's no known prefix, it
will guess "http://".
Separately, it relaxes the check of the host name so that IDN host names
can be passed in as well.
Both these changes are necessary for libcurl itself to use this API.
Assisted-by: Daniel Gustafsson
Closes#3018
TODO item 1.1 was implemented in commit 946ce5b61f, update reference
to it with instead referencing the implemented option.
Closes#3013
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
On Windows, the read function from <io.h> is used, which has its byte
count parameter as unsigned int instead of size_t.
Closes https://github.com/curl/curl/pull/2972
