largefiles: don't query the dirstate for key None
lfutil.splitstandin(f) can be None, and we query the dirstate for that without
checking if it is. This will cause problems with the upcoming move to critbit-
based dicts, since they only support strings as keys.
Kevin Bullock <kbullock@ringworld.org> [Sat, 16 Mar 2013 22:48:22 -0500] rev 18782
bookmarks: moving the active bookmark deactivates it
After this change, moving the active bookmark somewhere other than the
current changeset (i.e., with --rev) deactivates it. Previously it would
remain in .hg/bookmarks.current, which seems like a bug.