D2003: util: extract all date-related utils in utils/dateutil module

[mharbison72 (Matt Harbison)]

mharbison72 added a comment.


  Should dateutil.py be created with ‘hg cp’ to make annotate easier?

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D2003

To: lothiraldan, #hg-reviewers, durin42
Cc: mharbison72, durin42, mercurial-devel