[ADD]missing index.php to directories in which it has been forgotten

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49693 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] lang: Allow a page language to be set back to unknown if needed in update_page (thanks luciash)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49694 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Missing _tiki suffix... stable branch... careful please

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49695 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] wysiwyg: Don't remove no parse tags from plugin result previews as was required at some time in the past (Tiki 7?).
It seems now that either plugins have format=>html declared or the output will be wrapped in ~np~ tags if it needs them, so no longer remove them always.
Came about due to a smiley in an image description being parsed and totally breaking ckeditor - tested on various wysiwyg plugin stress test pages, seems ok...

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49697 b456876b-0849-0410-b77d-98878d47e9d5