Only show long-poll message in pool summary if it's not using stratum.

cgminer.c

@@ -4013,6 +4013,7 @@ static void display_pool_summary(struct pool *pool)
 		wlog("Pool: %s\n", pool->rpc_url);
 		if (pool->solved)
 			wlog("SOLVED %d BLOCK%s!\n", pool->solved, pool->solved > 1 ? "S" : "");
+		if (!pool->has_stratum)
 			wlog("%s own long-poll support\n", pool->hdr_path ? "Has" : "Does not have");
 		wlog(" Queued work requests: %d\n", pool->getwork_requested);
 		wlog(" Share submissions: %d\n", pool->accepted + pool->rejected);