Update to PHPMailer 5.2.4. props bpetty. fixes #21074.



git-svn-id: http://core.svn.wordpress.org/trunk@23522 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: usability improvement for better viewing of images on attachment pages. Props DrewAPicture and obenland, fixes #23543. 

git-svn-id: http://core.svn.wordpress.org/trunk@23523 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove bogus pagination rules from the comments permastruct. (As in, comments/page/?([0-9]{1,})/?$.) props wonderboymusic, fixes #21138.


git-svn-id: http://core.svn.wordpress.org/trunk@23524 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: usability improvement for calendar widget links. Props MikeHansenMe, fixes #23606.

git-svn-id: http://core.svn.wordpress.org/trunk@23525 1a063a9b-81f0-0310-95a4-ce76da25c4cd