Documentation/config.txt: Add git-gui options
Documentation/config.txt: Add git-gui options

The 'git gui' has a number of options that can be specified using the
options dialog. Sometimes it is convenient to be able to specify these
from the command line, therefor document these options.

Signed-off-by: Gustaf Hendeby <302720240404f61a7e4c1b4f05d365cf592fe0ad@isy.liu.se>
Acked-by: Shawn O. Pearce <a49428a47fdb064dc4b676d2654bf00be7d09105@spearce.org>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git