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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#ifndef HG_BDIFF_H

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#define HG_BDIFF_H

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#include "compat.h"

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struct bdiff_line {

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	int hash, n, e;

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	ssize_t len;

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	const char *l;

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};

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struct bdiff_hunk;

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struct bdiff_hunk {

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	int a1, a2, b1, b2;

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	struct bdiff_hunk *next;

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};

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int bdiff_splitlines(const char *a, ssize_t len, struct bdiff_line **lr);

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int bdiff_diff(struct bdiff_line *a, int an, struct bdiff_line *b, int bn,

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               struct bdiff_hunk *base);

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void bdiff_freehunks(struct bdiff_hunk *l);

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#endif