[ticket/8071] Make nextid alias of sql_last_inserted_id and add deprecation

PHPBB3-8071

phpBB/phpbb/db/driver/driver.php

@@ -634,6 +634,14 @@ abstract class driver implements driver_interface
 		return $expression;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function sql_nextid()
+	{
+		return $this->sql_last_inserted_id();
+	}
+
 	/**
 	* {@inheritDoc}
 	*/