Improve user save
Set status to "503 Service Temporarily Unavailable" when forum is offline
Remove some J!1.5 strings
Set version to RC2-DEV
Set status to "403 Forbidden" when forum can only be used by registered users
Fix #1720: Add configuration option to prevent access to /component/kunena
Merge pull request #1730 from mahagr/master

Improve SEO and add a new security feature