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.

diff --git a/tools/c_rehash.in b/tools/c_rehash.in
--- a/tools/c_rehash.in
+++ b/tools/c_rehash.in
@@ -1,4 +1,6 @@
-#!{- $config{HASHBANGPERL} -}
+eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
+  & eval 'exec perl -wS "$0" $argv:q'
+    if 0;
 {- use OpenSSL::Util; -}
 # {- join("\n# ", @autowarntext) -}
 # Copyright 1999-2021 The OpenSSL Project Authors. All Rights Reserved.
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<tr><td><span title='2023-03-06 21:27:06 -0500'>2023-03-06</span></td><td><a href='/guix/commit/gnu/packages/pkg-config.scm?id=ff5f34ae757d709987896d6164bf125319a0f764'>gnu: perl-extutils-pkgconfig: Support cross-compilation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/search-paths.scm ($PKG_CONFIG_PATH): New variable.
* gnu/packages/pkg-config.scm (%pkg-config): Use it.
* gnu/packages/perl.scm (perl-extutils-pkgconfig-for-target): New procedure.
(perl-extutils-pkgconfig): Turn into a syntax that
conditionally expands to...
(cross-perl-extutils-pkgconfig): ... this when %current-target-system is set,
or...
(%perl-extutils-pkgconfig): ... this in a native compilation context.
[arguments]: New field.
[propagated-inputs]: Turn into...
[native-inputs]: ... this.
[native-search-paths]: New field.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-13 02:04:59 -0400'>2022-09-13</span></td><td><a href='/guix/commit/gnu/packages/pkg-config.scm?id=eda94d13d4b1845c398ceee34c6bff7364bceaa6'>gnu: Add pkgconf.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/pkg-config.scm (pkgconf): New variable.
</span></span></td><td>Maxim Cournoyer</td></tr>