tag: invalidate tag cache immediately after adding new tag (issue3210) New tags were written to .hgtags / .hglocaltags without updating or invalidating the localrepo cache. Before afd459933d5f a lock was acquired soon after the new tags had been written, and that invalidated the cache so the new tags for example could be seen in pretxncommit hooks. With afd459933d5f the lock had already been acquired at this point and the missing cache invalidation was exposed. The tag caches will now explicitly and immediately be invalidated when new tags are added.

mq: ensure mq changesets are set to secret when no phase data are found

mq: qimporting revision set them to secret

mq: have mq create secret changeset only

wireproto: refuse to lookup secret csets

qclone: ignore local qbase if secret

rebase: only advance phase on successful commit

phases: mechanism to allow extension to alter initial computation of phase This commit add a whennodata list where extension can register a callback to be called if no phase related data are found in the repository. The goal is to ensure the existing extension that move phase data in 2.1 can compute consistent phase boundary for existing repo.

qclone: add a few comment and blank line This help readability.

mq: turn changeset draft on qfinish (except if qparent is secret) As mq automatically sets changesets as secret, it should make them draft when he is done with it. We do not move them automatically to draft when we detect that something else have also set them as secret through their parents.