test-mq-cache.t did apparently look at stale cache content.
Testing with different locking mechanism happened to update the cache more
frequently and thus caused a test failure.
Globbing is usually used for filenames, so on windows it is reasonable and very
convenient that glob patterns accepts '\' or '/' when the pattern specifies
'/'.
Before this patch undo.bookmarks was created on bookmarks write and
not with other transaction-related files. There were two issues: first
is that if you have changed bookmarks few times after a transaction
happened, rollback will give you a state which can point to
non-existing revision. Second is that if you have not changed
bookmarks after a transaction, rollback will touch your state anyway.
This change also adds `localrepo._writejournal` method, which can be
used by other extensions to save their transaction-related backup in
right time.
