Doc.

main.c

@@ -644,6 +644,9 @@ static int copy_argv (char *argv[])
  * Start a client for either type of remote connection.  Work out
  * whether the arguments request a remote shell or rsyncd connection,
  * and call the appropriate connection function, then run_client.
+ *
+ * Calls either start_socket_client (for sockets) or do_cmd and
+ * client_run (for ssh).
  */
 static int start_client(int argc, char *argv[])
 {