Only need to chmod +x or -x the socket when a client is created, lost or

attached, rather than every event loop.

cmd-new-session.c

@@ -277,6 +277,7 @@ cmd_new_session_exec(struct cmd *self, struct cmd_ctx *ctx)
 		}
 	}
 	recalculate_sizes();
+	server_update_socket();
 
 	return (!detached);	/* 1 means don't tell command client to exit */
 }