phabricator: allow local revisions to be specified with `phabupdate` It's way easier and less error prone to specify a revset after importing a series than to manually type in a series of Differentials. Unlike most revision oriented commands, this requires the `--rev` option explicitly because the existing `DREVSPEC` doesn't need to have the leading 'D', and therefore the meaning is ambiguous. I wouldn't have a problem giving precedence to the local revnum, but `phabread` and `phabimport` also use DREVSPEC, and local revisions make no sense there. I would be fine with modifying that definition to require the leading 'D', but I'm not sure how many people are used to not specifying it. Differential Revision: https://phab.mercurial-scm.org/D9356

copies: properly copies parent dictionary before updating it This enforces the copy on write logic. Otherwise independant unrelated branches could affected each other. More testing of these case are coming, but I need that code landed to unlock other performance work in parallel. Differential Revision: https://phab.mercurial-scm.org/D9419

upgrade: display the list of processed revlog before proceeding This help to make sure we don't wrongly skip some in the test and to make sure the user is aware of the amount of processing they is signing up for. Differential Revision: https://phab.mercurial-scm.org/D9469

rhg: add a test with persistent-nodemap Differential Revision: https://phab.mercurial-scm.org/D9519