" !defined(__GNUC__) || defined(__MINGW32__)" implies
CygWin.

name resolves. It could get stuck in the wrong state.

 o made ares_version.h use extern "C" for c++ compilers
 o fixed compiler warnings in ares_getnameinfo.c
 o fixed a buffer position init for TCP reads

allow applications to set their own socket options.

properly if you removed a "live" handle from a multi handle with
curl_multi_remove_handle().

code when doing pure ipv6 EPRT connections.

command on subsequent requests on a re-used connection unless it has to.

files in the root directory.

send the whole request at once, even though the Expect: header was disabled
by the application. An effect of this change is also that small (< 1024
bytes) POSTs are now always sent without Expect: header since we deem it
more costly to bother about that than the risk that we send the data in
vain.

to support older iconv versions.