Use a CDATA second for comment authors in RSS2 comment feeds so that HTML in comments doesn't kill the XML validation.

Fixes #17767 props wonderboymusic, dzver.

Built from https://develop.svn.wordpress.org/trunk@25009


git-svn-id: http://core.svn.wordpress.org/trunk@25003 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make is much easier for a theme to style the Post Password form.

Fixes #18729 props philiparthurmoore for the original patches.

Built from https://develop.svn.wordpress.org/trunk@25010


git-svn-id: http://core.svn.wordpress.org/trunk@25004 1a063a9b-81f0-0310-95a4-ce76da25c4cd