net-irc/unrealircd: changed dep on curl[ares,-ipv6] to curl
The ebuild had previously incorrectly carried a message saying that unrealircd required a copy of curl with ares built in and that curl's ipv6 useflag disables it's ares useflag even if portage records curl's cares flag as being set. The latter is true, but unrealircd runs fine with a copy of curl that is compiled without cares (which equals c-ares).