Change `mkdirs` to static

[ecki]

The idea is good, but it was already released. Do you want to break the API - in that case maybe a release notes is a good ideal.

also should the class get a private constrictor if all util methods will be static?

btw the recursive implementation has no provision for hitting the share as the parent, should it check for getParent() returning this?

[hierynomus]

Indeed, oversight on my part, these should've been static from the get-go.

Maybe introduce a new static method that gets called from the instance methods, and mark those deprecated. That would maintain API compatibility and allow you to call the static variants directly.

[ecki]

Maybe a new static util class with proper static impl and Limited constructor Accessibility (momostate) and delegate and deprecate the old class?

[hierynomus]

Also makes sense to do! Let's go for that