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

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# Dummy extension to define a namespace containing revision names

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from mercurial import namespaces

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def reposetup(ui, repo):

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    names = {b'r%d' % rev: repo[rev].node() for rev in repo}

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    namemap = lambda r, name: names.get(name)

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    nodemap = lambda r, node: [b'r%d' % repo[node].rev()]

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    ns = namespaces.namespace(

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        b'revnames',

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        templatename=b'revname',

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        logname=b'revname',

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        listnames=lambda r: names.keys(),

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        namemap=namemap,

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        nodemap=nodemap,

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    )

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    repo.names.addnamespace(ns)