Comment 2 for bug 61414

This should still be at least a wishlist to change the man page to
clarify that -g only works for -L port forwarding. In the SSH docs,
"port forwarding" is pretty much described the same for -L and -R
forwarding, so the -g description in the manual should make clear that
it is only for -L forwarding.

Either that, or it should do as it says in the manual and allow remote
hosts to connect to the forwarded port during a -R forwarded port.