This patch removes the explicit reference to the 'perl' binary,
such that OpenSSL does not retain a reference to Perl.

The 'c_rehash' program is seldom used, but it is used nonetheless
to create symbolic links to certificates, for instance in the 'nss-certs'
package.

--- openssl-1.0.2g/tools/c_rehash.in	2015-09-09 18:36:07.313316482 +0200
+++ openssl-1.0.2g/tools/c_rehash.in	2015-09-09 18:36:28.965458458 +0200
@@ -1,4 +1,6 @@
-#!/usr/local/bin/perl
+eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
+  & eval 'exec perl -wS "$0" $argv:q'
+    if 0;
 
 # Perl c_rehash script, scan all files in a directory
 # and add symbolic links to their hash values.
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<tr><td><span title='2017-03-30 01:30:16 +0200'>2017-03-30</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=6fd52309b8f52c9bb59fccffac53e029ce94b698'>gnu: Use HTTPS for almost all gnu.org HOME-PAGEs.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2016-12-07 10:23:17 +0100'>2016-12-07</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=ae12d586275cdd96db23fb01bf840b2055b5b979'>gnu: readline: support mingw.</a><span class='msg-avail'>...</span></td><td>Jan Nieuwenhuizen</td></tr>
<tr><td><span title='2016-11-13 17:01:01 -0500'>2016-11-13</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=d9721bcf27a049a87ee54701b8cb8e38dffd1a44'>gnu: readline-6.2: Fix CVE-2014-2524.</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2016-10-01 00:00:02 +0200'>2016-10-01</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=0c64d8564f9a4a7f6d6c9e5013e25193c598332d'>gnu: readline: Update to 7.0.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2016-07-17 08:56:03 +0300'>2016-07-17</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=a2285798832daa6b4d33aac3382171ec25ea032d'>gnu: Add rlwrap.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2016-04-14 10:38:21 +0300'>2016-04-14</span></td><td><a href='/guix/commit/gnu/packages/readline.scm?id=fc1adab1487e5ea3c5f6341263df14414ba4e784'>gnu: packages: Use 'search-patches' everywhere.</a><span class='msg-avail'>...</span></td><td>Alex Kost</td></tr>