[FIX] forums: Parsing HTML in incoming mails should not be dependant on WYSIWYG, as if wysiwyg_htmltowiki was disabled then the HTML got escaped and was visible in the message. It should happen if feature_forum_parse "Accept wiki syntax" is enabled, and the incoming HTML message will now be parsed to wiki syntax always (if the experimental pref forum_inbound_mail_parse_html is enabled).

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52763 b456876b-0849-0410-b77d-98878d47e9d5