made repo locks recursive and deprecate refcounting based lock releasing
all locks should use the explicit lock.release
mercurial.lock.lock.__del__ handles unwrapping recursive locks
localrepo.lock/wlock are still using weakref in order to keep backward
compatibiltiy to releasing locks via garbage collection
by ensuring the release on __del__
run-tests: fix -jN broken by
60a9e3cf0cf4
convert/mtn: handle subsecond commit dates (
issue1616)