Fix Perl module Module::Pluggable such that it can find plugins that live in
symlinked directories.

Patch borrowed/adapted from Nixpkgs.

--- Module-Pluggable-5.2/lib/Module/Pluggable/Object.pm   2015-04-08 23:28:48.120164135 -0500
+++ Module-Pluggable-5.2/lib/Module/Pluggable/Object.pm   2015-04-08 23:30:27.032166704 -0500
@@ -164,7 +164,7 @@
         my $sp = catdir($dir, (split /::/, $searchpath));

         # if it doesn't exist or it's not a dir then skip it
-        next unless ( -e $sp && -d _ ); # Use the cached stat the second time
+        next unless ( -e $sp );

         my @files = $self->find_files($sp);

@@ -279,7 +279,7 @@
                              (my $path = $File::Find::name) =~ s#^\\./##;
                              push @files, $path;
                            }
-                      }, $search_path );
+                      }, "$search_path/." );
     }
     #chdir $cwd;
     return @files;jtek's customized Guix</td><td class='sub right'></td></tr></table>
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<div class='path'>path: <a href='/guix/log/?id=c62820c1a4c1ffd6bd8298bf9596ab23e2ec1bdf'>root</a>/<a href='/guix/log/gnu?id=c62820c1a4c1ffd6bd8298bf9596ab23e2ec1bdf'>gnu</a>/<a href='/guix/log/gnu/services?id=c62820c1a4c1ffd6bd8298bf9596ab23e2ec1bdf'>services</a>/<a href='/guix/log/gnu/services/security-token.scm?id=c62820c1a4c1ffd6bd8298bf9596ab23e2ec1bdf'>security-token.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/services/security-token.scm?id=c62820c1a4c1ffd6bd8298bf9596ab23e2ec1bdf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-06-25 01:43:08 +0530'>2022-06-25</span></td><td><a href='/guix/commit/gnu/services/security-token.scm?id=037bfd85458dd0b32a6dd85b7c12e85e3dd716ae'>services: pcscd: Use switch-symlinks from (guix build utils).</a><span class='msg-avail'>...<span class='msg-tooltip'>switch-symlinks has been moved to (guix build utils). We need not duplicate it
anymore.

* gnu/services/security-token.scm (pcscd-activation): Use switch-symlinks
from (guix build utils).
</span></span></td><td>Arun Isaac</td></tr>
<tr><td><span title='2021-07-03 20:13:42 +0200'>2021-07-03</span></td><td><a href='/guix/commit/gnu/services/security-token.scm?id=e789ce538ed848bacb8f4eb5742f78b965ccf57c'>services: pcscd: Fix daemon signal handling.</a><span class='msg-avail'>...<span class='msg-tooltip'>"pcscd" wouldn't handle SIGTERM as it inherit ignoring this signal (and
others) from its parent shepherd; fork+exec-command restore signal
handling.  Fixes &lt;https://issues.guix.gnu.org/45202&gt;.

* gnu/services/security-token.scm (pcscd)[start]: Use
fork+exec-command to start "pcscd".
</span></span></td><td>Brice Waegeneire</td></tr>
<tr><td><span title='2021-06-19 23:49:18 +0200'>2021-06-19</span></td><td><a href='/guix/commit/gnu/services/security-token.scm?id=4bed8486d4c0a4ff142903b8bc1584ce84767355'>services: pcscd: Cleanup socket when started.</a><span class='msg-avail'>...<span class='msg-tooltip'>Otherwise when pcscd doesn't terminate properly (ie. receive a SIGKILL),
it won't start again because of it's socket already existing.

* gnu/services/security-token.scm (pcscd-shepherd-service)[start]:
Remove existing socket file.
</span></span></td><td>Brice Waegeneire</td></tr>