Bug#930347: showrgb man page FILES wrong

[積丹尼 Dan Jacobson]

Package: x11-xserver-utils
Version: 7.7+8
Severity: minor
File: /usr/share/man/man1/showrgb.1.gz

FILES
       /usr/share/X11/rgb  default database.

should actually be .../rgb.txt, (and even that is just a symlink.)