replace POSIX glob implementation with an internal implementation

[doy]

This will be necessary for Windows support, as well as ensuring consistency across platforms and allowing more room for expansion of functionality. (In preparation for #5832.)

[yichoi]

Android dose not support glob also

[emberian]

Still relevant

[Dretch]

I am currently rewriting glob in rust.

[emberian]

@Dretch did this, see extra::glob.