http_server: Add a flag to enable using control frames in user handlers

components/esp_http_server/src/esp_httpd_priv.h

@@ -75,6 +75,7 @@ struct sock_db {
     bool ws_handshake_done;                 /*!< True if it has done WebSocket handshake (if this socket is a valid WS) */
     bool ws_close;                          /*!< Set to true to close the socket later (when WS Close frame received) */
     esp_err_t (*ws_handler)(httpd_req_t *r);   /*!< WebSocket handler, leave to null if it's not WebSocket */
+    bool ws_control_frames;                         /*!< WebSocket flag indicating that control frames should be passed to user handlers */
 #endif
 };