packaging: update dulwich to drop the certifi dependency on Windows The presence of `certifi` causes the system certificate store to be ignored, which was reported as a bug against TortoiseHg[1]. It was only pulled in on Windows because of `dulwich`, which was copied from the old TortoiseHg install scripts, in order to support `hg-git`. This version of `dulwich` raises the minimum `urllib3` to a version (1.25) that does certificate verification by default, without the help of `certifi`[2]. We already bundle a newer version of `urllib3`. Note that `certifi` can still be imported from the user site directory, if installed there. But the installer no longer disables the system certificates by default. [1] https://foss.heptapod.net/mercurial/tortoisehg/thg/-/issues/5825 [2] https://github.com/jelmer/dulwich/issues/1025

tests: fix tar invocation, to address issue 6740

rhg-status: add support for narrow clones

rust: add support for hints in error messages This will be used by the narrow support code in the next commit.

rust: add Debug constraint to Matcher trait This makes sure we can easily debug which Matcher we're looking at when using trait objects, and is just generally useful. Effort to make the debugging output nicer has been kept to a minimum, please feel free to improve.

rhg: add sparse support

rhg: add debugrhgsparse command to help figure out bugs in rhg

rhg-status: extract a function for printing pattern file warnings This will be reused for the warnings produced by the sparse file parsing functions.

rust-filepatterns: allow overriding default syntax This will be used when parsing pattern files other than .hgignore like the sparse spec.

rhg: don't fallback if `strip` or `rebase` are activated Neither of these extensions do anything other than add commands, so ignoring them opens up more of the test suite to rhg.