add rudimentary locking capability to Friendica functions

update.php

@@ -1307,3 +1307,15 @@ function update_1150() {
 	return UPDATE_SUCCESS;
 }
 
+
+function update_1151() {
+	$r = q("CREATE TABLE IF NOT EXISTS lock (
+			id INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
+			name CHAR(128) NOT NULL ,
+			locked TINYINT(1) NOT NULL DEFAULT '0'
+		  ) ENGINE = MYISAM DEFAULT CHARSET=utf8 ");
+	if (!$r)
+		return UPDATE_FAILED;
+	return UPDATE_SUCCESS;
+}
+