Add licenses to files taken from dokuwiki.org

dokuwiki/templates/blacklist.sh.j2

 #!/bin/sh
 
+# taken from https://www.dokuwiki.org/blacklist
+# under CC BY-SA 4.0 International https://creativecommons.org/licenses/by-sa/4.0/deed.en
+# for authors see https://www.dokuwiki.org/blacklist?do=revisions
+
 blacklist="https://meta.wikimedia.org/wiki/Spam_blacklist?action=raw"
 
 {% for dw in dokuwiki %}

dokuwiki/templates/cleanup.sh.j2

 #!/bin/bash
 
+# taken from https://www.dokuwiki.org/tips:maintenance#automatic_cleanup_script
+# under CC BY-SA 4.0 International https://creativecommons.org/licenses/by-sa/4.0/deed.en
+# for authors see https://www.dokuwiki.org/tips:maintenance#automatic_cleanup_script?do=revisions
+
 function cleanup()
 {
     local data_path="$1"        # full path to data directory of wiki

dokuwiki/templates/delete_old_files.py.j2

 #!/usr/bin/env python3
+
+# taken from https://www.dokuwiki.org/install:unused_files
+# under CC BY-SA 4.0 International https://creativecommons.org/licenses/by-sa/4.0/deed.en
+# for authors see https://www.dokuwiki.org/install:unused_files?do=revisions
+
 import os
 import os.path
 import shutil