localrepo/branchcache: kill unused localrepo.branchcache The UTF-8 version of the branchcache is the master, always up-to-date, we can rename it to localrepo._branchcache.

localrepo/branchcache: rebuild the "charset-aware" branchcache when needed It's simpler and the two cache weren't always in sync otherwise: localrepo.branchcache would not be updated after calling branchmap()

churn: fix --progress (broken by f3d60543924f)

transfer branchmap branch names over the wire in utf-8

churn: fix changeset count (broken by 9b127e888640)

churn: ability to display added/removed lines separately

cmdutil: fix bug in finddate() implementation

merge changes from mpm

cmdutil: update finddate() walkchangerevs() now returns contexts, does not take a cache func.

walkchangerevs: drop ui arg

walkchangerevs: reset cache between windows

log: tidy up some filter tests