document --exec for git-push
document --exec for git-push

The text is just copied from git-send-pack.txt.

Signed-off-by: Uwe Kleine-K,Av(Bnig <9a76061462e931ee4754bd4b0b8c4a2a18405dd3@informatik.uni-freiburg.de>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

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