D612: command: add a cmdtype argument to registrar.command

[quark (Jun Wu)]

quark added subscribers: indygreg, quark.
quark added a comment.


  I think @indygreg has some ideas around making "read-only" vs "writable" repo objects. I personally think it's cleaner to make this repo level.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D612

To: pulkit, #hg-reviewers, durham
Cc: quark, indygreg, smf, yuja, durham, mercurial-devel