AUTHORS, CONTRIBUTORS: still useful, add people from git log, clean up.
LICENSE: Google doesn't really grant you shit anymore. The EU doesn't
have software patents either, so it doesn't affect me directly.
README, doc.go: erase mentions of unmaintained xgbutil.
Some field values in the Xauthority file have special meanings:
- a value of 65535 in the 'family' field means that the entry will
match a connection of any family on any address
- an empty string in the 'display number' field means that the entry
will match a connection on any display number
This behaviour is documented at:
https://cgit.freedesktop.org/xorg/lib/libXau/tree/AuGetBest.c#n109
