Improve client timeout hanlding.

Do not run the idle timer check for client if it still has a request
queued up. Otherwise if the worker process is very busy you might hit
the timeout even though the client sent us a full request which was queued.

src/connection.c

@@ -166,6 +166,8 @@ kore_connection_check_timeout(u_int64_t now)
 			continue;
 		if (!(c->flags & CONN_IDLE_TIMER_ACT))
 			continue;
+		if (!TAILQ_EMPTY(&c->http_requests))
+			continue;
 		kore_connection_check_idletimer(now, c);
 	}
 }