Reported by the new script 'scripts/copyright.pl'. The script has a
regex whitelist for the files that don't need copyright headers.
Removed three (mostly usesless) README files from docs/
Closes#5141
SO_EXCLUSIVEADDRUSE is on by default on Vista or newer,
but does not work together with SO_REUSEADDR being on.
The default changes were made with stunnel 5.34 and 5.35.
It seems the fips config option causes an error if FIPS mode was
not enabled at stunnel compile-time. FIPS support was disabled
by default in stunnel 5.00, so this is probably really only needed
on versions between 4.32 and 5.00.
Since /dev/stdout is not always emulated on Windows,
just skip the output option on Windows.
MinGW/msys support /dev/stdout only from a new login shell.
tstunnel on Windows does not support the pid option and is unable
to write to an output log that is already being used as a redirection
target for stdout. Therefore it does now output all log data to stdout
by default and secureserver.pl creates a fake pidfile on Windows.
