[FIX] parser: Revert r50586 (preserve some settings such as absolute_links...) as it stops pretty trackers working, sorry Xavi

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50590 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] wikiplugin: is_html option should be true or false (or possibly 1 or 0)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50591 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] tracker plugin: Don't set a default value for all "DropDown" type fields with a repeated (default) option, not just plain 'd' ones (thanks Xavi, does this fix wish5121?)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50592 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] countdown: Catch badly formed end dates

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50593 b456876b-0849-0410-b77d-98878d47e9d5