changelog: also monitor `00changelog.n` when applicable (issue6554) This let the locarepo's file cache detect outdated nodemap docket and reload the changelog after `localrepo.invalidate` when applicable. Differential Revision: https://phab.mercurial-scm.org/D11482

persistent-nodemap: introduce a test to highlight possible race Weakness in the current file caching of the changelog means that a writer can end up using an outdated docket. This might result in "committed" persistent-nodemap data from a previous writer to be overwritten by a later writer. This break the strong "append only" assumption of the persistent nodemap and can result in confused reader. The race windows are quite narrow. See the test documentation for details. The issues is fixed in the next changeset. Differential Revision: https://phab.mercurial-scm.org/D11481

test: enable share-safe in test-persistent-nodemap We will use some share in this test and I would rather have them safe. Differential Revision: https://phab.mercurial-scm.org/D11480

filecache: abstract the fetching of the list of tracked file We will need it for a coming fix that will requires to check a variable list of file for the changelog. Differential Revision: https://phab.mercurial-scm.org/D11479

persistent-nodemap: use quiet upgrade in tests This make them less verbose while keeping the important information in the checked output. Differential Revision: https://phab.mercurial-scm.org/D11478

persistent-nodemap: fix a typo in a test comment oops. Differential Revision: https://phab.mercurial-scm.org/D11477