add explnaation tro exampleconfig

exampleconfig.py

-# url for Wiki  'https://user:password@wiki.example.com/lib/exe/xmlrpc.php' for Dokuwiki
+# url for the dokuwiki
+# basic auth is used hence the 'username:password@' at the front (no other login method is supported at the moment)
+# https is recomended in order to not send unencryptet login details 
 WIKI_API_URL = "https://user:password@wiki.example.com/lib/exe/xmlrpc.php"