nixos/tomcat: add extraGroups type (#110486)

Changed files
+1
nixos
modules
services
web-servers
+1
nixos/modules/services/web-servers/tomcat.nix
···
extraGroups = mkOption {
default = [];
+
type = types.listOf types.str;
example = [ "users" ];
description = "Defines extra groups to which the tomcat user belongs.";
};