Don't just drop out the bottom of the function on timeout.

If we don't get one of the commands we're waiting for, close the
socket and exit instead of returning with the appearance of having
received one.

exec/irc.js

@@ -664,6 +664,9 @@ function wait_for(commands)  {
 		// Don't handle user input at this point!
 		// screen.update();
 	}
+	alert("Connection timed out");
+	sock.close();
+	clean_exit();
 }
 
 function in_a_channel() {