Mention 'git receive-pack' --cc/--reviewer args

Since we switched to args4j for our parsing these options are available
on both 'git receive-pack' and 'gerrit receive-pack'.  We might as well
just talk about it on 'git receive-pack' in the documentation.

Signed-off-by: Shawn O. Pearce <sop@google.com>
1 file changed