This is a rewrite of the hostname_replace.py that:
- don't stop to replace URL in fields ('data_src', 'audio_src') if there isn't a
'parsed_url',
- adds a comment about keep or remove a result from the result list
- adds a loop over ['data_src', 'audio_src'] instead of doubling code lines
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>