Fix buffer overflow processing long words in Mangle().

Patch adpated from upstream commit, omitting changes to 'NEWS':

https://github.com/cracklib/cracklib/commit/33d7fa4585247cd2247a1ffa032ad245836c6edb

From 33d7fa4585247cd2247a1ffa032ad245836c6edb Mon Sep 17 00:00:00 2001
From: Jan Dittberner <jan@dittberner.info>
Date: Thu, 25 Aug 2016 17:17:53 +0200
Subject: [PATCH] Fix a buffer overflow processing long words

A buffer overflow processing long words has been discovered. This commit
applies the patch from
https://build.opensuse.org/package/view_file/Base:System/cracklib/0004-overflow-processing-long-words.patch
by Howard Guo.

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=835386 and
http://www.openwall.com/lists/oss-security/2016/08/23/8
---
 src/NEWS        | 1 +
 src/lib/rules.c | 5 ++---
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/lib/rules.c b/src/lib/rules.c
index d193cc0..3a2aa46 100644
--- a/lib/rules.c
+++ b/lib/rules.c
@@ -434,9 +434,8 @@ Mangle(input, control)		/* returns a pointer to a controlled Mangle */
 {
     int limit;
     register char *ptr;
-    static char area[STRINGSIZE];
-    char area2[STRINGSIZE];
-    area[0] = '\0';
+    static char area[STRINGSIZE * 2] = {0};
+    char area2[STRINGSIZE * 2] = {0};
     strcpy(area, input);
 
     for (ptr = control; *ptr; ptr++)
mit/etc/time-travel-manifest.scm?id=92f3476077da668a34399f3f854b605827f71baf'>commit</a><a href='/guix/diff/etc/time-travel-manifest.scm?id=92f3476077da668a34399f3f854b605827f71baf'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/etc/time-travel-manifest.scm'>
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<div class='path'>path: <a href='/guix/log/?id=92f3476077da668a34399f3f854b605827f71baf'>root</a>/<a href='/guix/log/etc?id=92f3476077da668a34399f3f854b605827f71baf'>etc</a>/<a href='/guix/log/etc/time-travel-manifest.scm?id=92f3476077da668a34399f3f854b605827f71baf'>time-travel-manifest.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/time-travel-manifest.scm?id=92f3476077da668a34399f3f854b605827f71baf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-08-17 15:42:56 +0200'>2022-08-17</span></td><td><a href='/guix/commit/etc/time-travel-manifest.scm?id=845c841e21379e64a4215ee6d3d60da343e7fb93'>time-travel-manifest: Use a separate cache per system.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/time-travel-manifest.scm (&lt;guix-instance-compiler&gt;): Use a separate
cache per system so that parallel system evaluations do no step on each
other's toes.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-07-10 23:57:14 +0200'>2022-07-10</span></td><td><a href='/guix/commit/etc/time-travel-manifest.scm?id=5d0437ea8ce0147b47b9df866fa2413b48f71a1a'>time-travel-manifest: Use a separate Git checkout cache.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/time-travel-manifest.scm (guix-instance-compiler): Parameterize
%REPOSITORY-CACHE-DIRECTORY.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-07-08 23:58:11 +0200'>2022-07-08</span></td><td><a href='/guix/commit/etc/time-travel-manifest.scm?id=e80f0cda96181d90604c44f69094f2499036b3f6'>etc: Add 'time-travel-manifest.scm'.</a><span class='msg-avail'>...<span class='msg-tooltip'>This manifest makes it easy to test travels from the current revision
back to the revision of a past Guix release.

Suggested by zimoun &lt;zimon.toutoune@gmail.com&gt;.

* etc/time-travel-manifest.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
</span></span></td><td>Ludovic Courtès</td></tr>