filectx.ancestor: use fctx._repopath to cache filelogs (
issue1035)
_repopath may be different from _path for workingfilectx when there
are renames involved.
Revert
cfebb175704f, fixing the output of 2 tests
test-mv-cp-st-diff: avoid linkrev collisions
The copy detection code relies heavily on the linkrevs, so it's better
to avoid collisions in this test.
convert: avoid querying log of foreign svn branches
Server configuration may prevent access to other branches, so don't even try to
get them, instead of ignoring them afterwards.
patch: check filename is /dev/null for creation or deletion (issue 1033)
Otherwise, file creation or deletion is ambiguous with file being filled or
emptied.