[FIX] Restore fold/unfold of preferences which depend on registerPasscode

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52745 b456876b-0849-0410-b77d-98878d47e9d5
[FIX][bp/r52330][bp/r52752] Check if behind a Frontend-Proxie/Load-Balancer which rewrites ports (some cloud offerings need this) (thanks Soulou)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52753 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Give enough control on canonical urls to actually permit preventing duplicate listings in search engines as advertised

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52755 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Typo

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52759 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] theme: Test to see if file custom.css is there

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52762 b456876b-0849-0410-b77d-98878d47e9d5
[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
[MRG] Automatic merge, branches/13.x 52742 to 52763

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@52764 b456876b-0849-0410-b77d-98878d47e9d5