bundle: include required phases when saving a bundle (issue6794) We now properly computes and includes phases above secret in bundle, previously, they would be skipped, and then the code computing them would crash. Note that from this changeset, we also include the heads associated with the changegroup's "target" phase. This turned out to be necessary to ensure the movement of changeset included in the bundle, but already known locally. This explain why lines for "secret" heads appears in multiple tests.

bundle: add test bundling changeset in the "archived" phase Having this test highlight that phase bundling above secret is significantly broken. Fixes coming in the next changesets.

bundle: introduce a "v3" spec This is a small update from "v2", we use the freshly out of experimental changelog version "03' format (alignment with bundle version is a coincidence) and we now bundle phases by default. We shall use v3 as the default bundle type later, when changegroup version '03' is a bit more established

bundle: add some phase boundary in the bundle type test case Same logic as the previous one, we want the tests to cover richer cases. It actually reveal a bug in `hg bundle foo.hg REMOTE` involving secret. So this is definitly not a bad idea.

bundle: expand the graph we us for bundletype/bundlespec tests We are about to test more things, especially phase bundling, so we need a graph a bit more complex than a single node. The test "code" was a bit simplified in the process, but no test-semantic changes were made.

revset: include all non-public phases in _notpublic We forgot up to update this when new phases were added.

dirstate: remove _actual_file_name methode This is dead-code

undo-files: cleanup legacy files when applicable The "journal" code is much more compact in 6.4, and so is the "undo" files as a result. However the previous version were much noisier, so let us cleanup undo files from older version too.

undo-files: clean existing files up before writing new one the in the initial design of journal/undo interaction, ages ago, new file always overwrote previous files. This is no longer the case for a long while, so it is time to properly clean things up before writing new ones. Otherwise, inconsistent "undo" state might exist on disk, leading `hg rollback` to misbehave (more that intended).

undo-files: make the undo-prefix configurable in `cleanup_undo_files` The transaction is configuration undo prefix, so we "need" it too.