D1000: contrib: add check-code rule banning use of readlink

[mitrandir (Mateusz Jakub Kwapich)]

mitrandir added a comment.


  Wow, it's https://phab.mercurial-scm.org/D1000 :D
  partysnake <https://phab.mercurial-scm.org/file/data/rtvhzxf3k76lfp76cco2/PHID-FILE-tzs5jc2ybb5syhm4uhio/20265877_1768566626504339_5323767393963474944_n.jpg>

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D1000

To: durin42, #hg-reviewers, quark, ryanmce
Cc: mitrandir, ryanmce, quark, mercurial-devel