Check for getaddrinfo rather than gethostbyname in configure.ac
Check for getaddrinfo rather than gethostbyname in configure.ac

Since the addition of IPv6 support, we now use getaddrinfo rather than
gethostbyname; update configure.ac accordingly.

topcat/xcb-win32,OpenInkpot-archive/iplinux-libxcb,OpenInkpot-archive/iplinux-libxcb,OpenInkpot-archive/iplinux-libxcb,stapelberg/libxcb,topcat/xcb-win32,topcat/xcb-win32,stapelberg/libxcb,topcat/xcb-win32,topcat/xcb-win32,stapelberg/libxcb