To make sure the Host: header and the URL provide the same authority
portion when sent to the proxy, strip the default port number from the
URL if one was provided.
Reported-by: Michael Brown
Fixes#6769Closes#6778
missing CRs and modified %hostip
lib556/test556: use a real HTTP version to make test reuse more convenient
make sure the weekday in Date headers matches the date
test61: replace stray "^M" (5e 4d) at the end of a cookie with a '^M' (0d)
Gets the test working with external proxies like Privoxy again.
Closes#6463