Document git-instaweb start/stop/restart
Document git-instaweb start/stop/restart

The flags --start, --stop, and --restart can be used without the "--".
Document this feature.

Signed-off-by: Jared Hance <8394ca3b153c892a344e6ee3e8f1a72af742d8a3@gmail.com>
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