repo 1.6.7.2

Fix UnboundLocalError: local variable 'port' when using SSH

If the SSH URL doesn't contain a port number, but uses the ssh://
or git+ssh:// syntax we raised a Python runtime error due to the
'port' local variable not being assigned a value.  Default it to
the IANA assigned port for SSH, 22.

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