Support XDM-AUTHORIZATION-1 on IPv6
Support XDM-AUTHORIZATION-1 on IPv6

Commit by Jamey Sharp and Josh Triplett.

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