cext: use modern buffer protocol in mpatch_flist() Differential Revision: https://phab.mercurial-scm.org/D4841

cext: use modern buffer protocol in patches() PyObject_AsCharBuffer() is part of the "Old Buffer Protocol," which has been deprecated for years. Let's port away from it. PyBuffer_GetBuffer() must be paired with PyBuffer_Release(), hence the added "goto cleanup" in a failure case. We don't bump the extension version because the API has not changed. Differential Revision: https://phab.mercurial-scm.org/D4840

identify: when using -T, avoid unnecessary remote bookmarks query Differential Revision: https://phab.mercurial-scm.org/D4839

identify: only query remote bookmarks if needed Instead of all the time when operating on a remote repo. This perf regression was introduced in 15a79ac823e8, in 4.3. This datahint method returns nothing for -Tjson, -Tpickle, -Tdebug --config ui.formatdebug=true and --config ui.formatjson, so the bookmarks won't show up. I don't know what these formatters are for. plainformatter and templateformatter work properly, and the few other uses of datahint should have the same kind of problem. There is further weirdness where "--template '{node}'" is not enough to avoid querying the bookmarks, you also need to pass --id or -q. Differential Revision: https://phab.mercurial-scm.org/D4819

py3: whitelist another passing tests caught by buildbot I this indygreg recent patches made this test pass on Python 3. So thanks to him! Differential Revision: https://phab.mercurial-scm.org/D4848

manifest: remove an unused variable caught by pyflakes Uses of todel were removed in D4843 (19103e68a698). This patch will make buildbots green again. Differential Revision: https://phab.mercurial-scm.org/D4847