http keepalive needs to reinit some header union state

AG moved the code to the keepalive loop location

lib/handshake.c

@@ -173,17 +173,23 @@ read_ok:
 
 http_complete:
 	lwsl_debug("libwebsocket_read: http_complete\n");
-	/* Handle keep-alives, by preparing for a new request: */
+
+	/* Did the client want to keep the HTTP connection going? */
+
 	if (wsi->u.http.connection_type == HTTP_CONNECTION_KEEP_ALIVE) {
 		lwsl_debug("libwebsocket_read: keep-alive\n");
 		wsi->state = WSI_STATE_HTTP;
 		wsi->mode = LWS_CONNMODE_HTTP_SERVING;
-		/* We might be streaming HTTP content, so leave the connection open.*/
+
+		/* He asked for it to stay alive indefinitely */
 		libwebsocket_set_timeout(wsi, NO_PENDING_TIMEOUT, 0);
 
 		if (lws_allocate_header_table(wsi))
 			goto bail;
 
+		/* If we're (re)starting on headers, need other implied init */
+		wsi->u.hdr.ues = URIES_IDLE;
+
 		/* If we have more data, loop back around: */
 		if (len)
 			goto http_new;