unbundle: test and fix for clean abort on unknown bundle2 feature This introduce a test for the feature and fix the exception name that is different on default.

merge with stable

localrepo: recreate phasecache if changelog was modified (issue4855) Because _phaserevs and _phasesets cache revision numbers, they must be invalidated if there are new commits or stripped revisions. We could do that by calling _phasecache.invalidate(), but it wasn't simple to be integrated with the filecache mechanism. So for now, phasecache will be recreated after repo.invalidate() if 00changelog.i was modified before.

progress: force a repaint of a printed progress bar after a clear() This avoids some visual flickering of the progress bar in convert and probably some other operations. Previously, a line of output would erase the progress bar, and then it would wait `progress.refresh` seconds (default of 0.1) before redrawing the progress bar. Now if we've ever painted a progress bar, we schedule the progress bar for immediate repainting on the next progress call, which helps lend the illusion that the progress bar is "always" there. In practice, it's merely there more of the time, but it ends up being a lot easier to read during convert.