Replace htmlspecialchars_decode with html_entity_decode in XML::unescape
Replace htmlspecialchars_decode with html_entity_decode in XML::unescape

- Replace htmlspecialchars with htmlentities in XML::escape
- This allows for converting all entities from Diaspora messages to regular characters

fabrixxm/friendica,fabrixxm/friendica,tobiasd/friendica,fabrixxm/friendica,tobiasd/friendica,tobiasd/friendica,friendica/friendica,annando/friendica,annando/friendica,friendica/friendica,tobiasd/friendica,annando/friendica,tobiasd/friendica,fabrixxm/friendica,friendica/friendica,annando/friendica,annando/friendica,friendica/friendica,friendica/friendica,fabrixxm/friendica