nixos/automysqlbackup: add some missing permissions

    services.mysql.ensureUsers = optional (config.services.mysql.enable && cfg.config.mysql_dump_host == "localhost") {

      name = user;

      ensurePermissions = { "*.*" = "SELECT, SHOW VIEW, TRIGGER, LOCK TABLES, EVENT"; };

      ensurePermissions = {

        "*.*" = "SELECT, SHOW VIEW, TRIGGER, LOCK TABLES, EVENT";

        # https://forums.mysql.com/read.php?10,668311,668315#msg-668315

        "function sys.extract_table_from_file_name" = "execute";

        "function sys.format_path" = "execute";

        "function sys.format_statement" = "execute";

        "function sys.extract_schema_from_file_name" = "execute";

        "function sys.ps_thread_account" = "execute";

        "function sys.format_time" = "execute";

        "function sys.format_bytes" = "execute";

      };

    };

  };