Added new event, MG_REQUEST_COMPLETE

mongoose.c

@@ -3910,6 +3910,7 @@ static void process_new_connection(struct mg_connection *conn) {
       conn->content_len = cl == NULL ? -1 : strtoll(cl, NULL, 10);
       conn->birth_time = time(NULL);
       handle_request(conn);
+      call_user(conn, MG_REQUEST_COMPLETE);
       log_access(conn);
       discard_current_request_from_buffer(conn);
     }

mongoose.h

@@ -56,8 +56,9 @@ enum mg_event {
   MG_NEW_REQUEST,   // New HTTP request has arrived from the client
   MG_HTTP_ERROR,    // HTTP error must be returned to the client
   MG_EVENT_LOG,     // Mongoose logs an event, request_info.log_message
-  MG_INIT_SSL       // Mongoose initializes SSL. Instead of mg_connection *,
+  MG_INIT_SSL,      // Mongoose initializes SSL. Instead of mg_connection *,
                     // SSL context is passed to the callback function.
+  MG_REQUEST_COMPLETE  // Mongoose has finished handling the request
 };
 
 // Prototype for the user-defined function. Mongoose calls this function