Remove the indexer lock if it's too old (> 5 hours)

root/etc/cron.daily/ajaxplorer-indexer

@@ -24,6 +24,12 @@ foreach my $share ($a->get_all_by_prop(type => 'share')){
     $indexer = $share->prop('AjaxplorerIndexer') || 'enabled';
     next if ($ajaxplorer ne 'enabled' || $indexer ne 'enabled');
     my $name = $share->key;
+    # Check if the lock file is present and if it's too old (last index crashed ?)
+    if (-e "/var/cache/ajaxplorer/indexes/.ajxp_lock-$name"){
+        my $mtime = stat("/var/cache/ajaxplorer/indexes/.ajxp_lock-$name")->mtime;
+        unlink <"/var/cache/ajaxplorer/indexes/.ajxp_lock-$name">
+            if (time() - $mtime > 18000);
+    }
     system('/usr/bin/sudo -u www /usr/bin/php /usr/share/ajaxplorer/cmd.php ' .
            '-u=RDiin175M40T0cYvXLARpAi+1TsSVkbksEDZ4KvwBuY= '.
            '-t=e71479ebc4365176d9f09fe957780024 -a=index '.