Add the optional ares_config_info patch from Unreal IRCD, on by default;
this is a step closer to building Unreal IRCD with the port version of
c-ares.
for asynchronous DNS resolving. It was repo-copied from the dns/ares port.
WWW: http://daniel.haxx.se/projects/c-ares/
Author: Daniel Stenberg <daniel@haxx.se>