D6271: rust-filepatterns: add a Rust implementation of pattern-related utils

[durin42 (Augie Fackler)]

durin42 requested changes to this revision.
durin42 added a comment.
This revision now requires changes to proceed.


  (forgot to tag as needing changes)

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D6271

To: Alphare, #hg-reviewers, kevincox, durin42
Cc: durin42, kevincox, mercurial-devel