git: Wrong parsing of ssh urls with IPv6 literals ignores port

If we encounter an address part shaped like "[HOST]:PORT", we skip the opening
bracket and replace the closing one with a NUL.  The variable host then points
to HOST and we've cut off the PORT part.  Thus, when we go looking for it using
host a bit later, we can't find it.  Start at end instead, which either points
to the colon, if present, or is equal to host.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

connect.c

@@ -536,7 +536,7 @@ struct child_process *git_connect(int fd[2], const char *url_orig,
 	 * Add support for ssh port: ssh://host.xy:<port>/...
 	 */
 	if (protocol == PROTO_SSH && host != url)
-		port = get_port(host);
+		port = get_port(end);
 
 	if (protocol == PROTO_GIT) {
 		/* These underlying connection commands die() if they