Merge commit '12bf9ff' into bfgminer-2.9.x

util.c

@@ -1326,6 +1326,7 @@ bool initiate_stratum(struct pool *pool)
 		if (unlikely(!pool->stratum_curl))
 			quit(1, "Failed to curl_easy_init in initiate_stratum");
 	}
+	pool->readbuf.len = 0;
 	mutex_unlock(&pool->stratum_lock);
 	curl = pool->stratum_curl;