progress: move cached debug flag from progress.progbar to scmutil.progress...
progress: move cached debug flag from progress.progbar to scmutil.progress
It's simpler this way. One possible drawback (and a possisble
advantage) is that we now check the debug flag once per topic, so
processes that generate new topics all the time will still check the
flag frequently.
Differential Revision:
https://phab.mercurial-scm.org/D5528
