Use a non-recursive replace function when the parser supports it.

https://bugs.gnu.org/29782
https://bugzilla.samba.org/show_bug.cgi?id=9515
https://bugzilla.gnome.org/show_bug.cgi?id=736077 (for xsltproc)

Patch copied from Debian:
https://anonscm.debian.org/cgit/collab-maint/docbook-xsl.git/tree/debian/patches/765567_non-recursive_string_subst.patch

Description: use EXSLT "replace" function when available
 A recursive implementation  of string.subst is problematic,
 long strings with many matches will cause stack overflows.
Author: Peter De Wachter <pdewacht@gmail.com>
Bug-Debian: https://bugs.debian.org/750593

--- a/lib/lib.xsl
+++ b/lib/lib.xsl
@@ -10,7 +10,10 @@
      This module implements DTD-independent functions
 
      ******************************************************************** -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+                xmlns:str="http://exslt.org/strings"
+                exclude-result-prefixes="str"
+                version="1.0">
 
 <xsl:template name="dot.count">
   <!-- Returns the number of "." characters in a string -->
@@ -56,6 +59,9 @@
   <xsl:param name="replacement"/>
 
   <xsl:choose>
+    <xsl:when test="function-available('str:replace')">
+      <xsl:value-of select="str:replace($string, string($target), string($replacement))"/>
+    </xsl:when>
     <xsl:when test="contains($string, $target)">
       <xsl:variable name="rest">
         <xsl:call-template name="string.subst">
u/packages/arcan.scm'>
<input type='hidden' name='id' value='3a555a93a9f8e15095da8c79c7fa415ed21bf5b7'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=3a555a93a9f8e15095da8c79c7fa415ed21bf5b7'>root</a>/<a href='/guix/log/gnu?id=3a555a93a9f8e15095da8c79c7fa415ed21bf5b7'>gnu</a>/<a href='/guix/log/gnu/packages?id=3a555a93a9f8e15095da8c79c7fa415ed21bf5b7'>packages</a>/<a href='/guix/log/gnu/packages/arcan.scm?id=3a555a93a9f8e15095da8c79c7fa415ed21bf5b7'>arcan.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/gnu/packages/arcan.scm?id=3a555a93a9f8e15095da8c79c7fa415ed21bf5b7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/arcan.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-09-16 10:15:34 +0200'>2021-09-16</span></td><td><a href='/guix/commit/gnu/packages/arcan.scm?id=c9f7770eeec3a7b493dcbf45c96a4528f2635604'>gnu: arcan: Fix build.</a><span class='msg-avail'>...</span></td><td>Guillaume Le Vaillant</td></tr>
<tr><td><span title='2021-07-24 16:23:23 +0200'>2021-07-24</span></td><td><a href='/guix/commit/gnu/packages/arcan.scm?id=425ccde6ae7bd4b448ee2fffd8c0b6b7bcbb543c'>gnu: Use 'search-input-directory' when looking for C/C++ library headers.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-07-12 23:08:15 +0200'>2020-07-12</span></td><td><a href='/guix/commit/gnu/packages/arcan.scm?id=b0e7b6992f3f845e83cfbca4d700b51dba50b4d5'>gnu: Remove ".git" from "https://github/…/….git".</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
eaca33b816b2d56af1d814a03bde'>build: Don’t delete ‘guix-gc.timer’ file.</a><span class='msg-avail'>...</span></td><td>Xinglu Chen</td></tr>
<tr><td><span title='2021-09-20 14:18:21 +0000'>2021-09-20</span></td><td><a href='/guix/commit/nix?id=5c4fd77097e2cecfd4780e099af7954f86779fe1'>etc: Add systemd files for running ‘guix gc’ periodically</a><span class='msg-avail'>...</span></td><td>Thiago Jung Bauermann</td></tr>
<tr><td><span title='2021-04-09 17:46:38 +0200'>2021-04-09</span></td><td><a href='/guix/commit/nix?id=2d73086262e1fb33cd0f0f16f74a495fe06b38aa'>daemon: 'guix substitute' replies on FD 4.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-04-03 22:08:33 +0200'>2021-04-03</span></td><td><a href='/guix/commit/nix?id=222fff253c6c6a3d1def16ed90723d7f2c4f9b89'>daemon: Remove dead code.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-03-30 10:29:33 +0300'>2021-03-30</span></td><td><a href='/guix/commit/nix?id=aed51ecea87f9b5045cc888cd1d9653a27813164'>gnu: guix: Fix openrc init scripts.</a><span class='msg-avail'>...</span></td><td>zimoun</td></tr>
<tr><td><span title='2021-03-18 12:18:56 +0100'>2021-03-18</span></td><td><a href='/guix/commit/nix?id=ec7fb669945bfb47c5e1fdf7de3a5d07f7002ccf'>daemon: Prevent privilege escalation with '--keep-failed' [security].</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-03-17 12:03:23 +0100'>2021-03-17</span></td><td><a href='/guix/commit/nix?id=bc3896db25c788c181c7bcd65754e7cd378e9d9f'>daemon: Correctly handle '--discover' with no value.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>