Improved File deletion

[MasterEnderman]

It would be greatly appreciated if we could get the possibility to define a folder and delete all files that either match a RegEx or have a specific file extension.

I got this idea while working on a pack and clogging up my logs folder with *.gz files after each restart.
I'm already using filedirector to manage other folders, so I don't really want to use another mod just for that.