- The login page has "X-Frame-Options: DENY" header.
- Cross-domain when displaying on the front-end on multisite with domain mapping.
- The site forces ssl login but not ssl admin.
Add onbeforeunload prompt to counter (frame-busting) JS redirects. Move the JS and CSS into separate files. See #23295.
git-svn-id: https://develop.svn.wordpress.org/trunk@23805 602fd350-edb4-49c9-b593-d223f7449a82