switch back to kqueue for now, since (a) kqueue has been fixed to deal

with strange devices and (b) since there appears to be a bull in the
poll code in libevent as well...
requested by nicm who is away

tmux.c

@@ -532,10 +532,7 @@ main(int argc, char **argv)
 		exit(1);
 	}
 
-	if (setenv("EVENT_NOKQUEUE", "1", 1) != 0)
-		fatal("setenv");
 	ev_base = event_init();
-	unsetenv("EVENT_NOKQUEUE");
 	set_signals(main_signal);
 
 	/* Initialise the client socket/start the server. */