Add post-type-$post_type and taxonomy-$taxonomy admin body classes.

props johnbillion.
fixes #19247.

Built from https://develop.svn.wordpress.org/trunk@25124


git-svn-id: http://core.svn.wordpress.org/trunk@25104 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Network Admin: Hide the bulk actions checkbox for the main site.

props ericlewis.
fixes #24463.

Built from https://develop.svn.wordpress.org/trunk@25125


git-svn-id: http://core.svn.wordpress.org/trunk@25105 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Return 1 from get_comment_pages_count() when pagination is disabled.

props obenland.
fixes #17778.

Built from https://develop.svn.wordpress.org/trunk@25126


git-svn-id: http://core.svn.wordpress.org/trunk@25106 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Avoid a PHP notice in wpmu_create_blog() if $meta is not passed. props duck_, jeremyfelt, SergeyBiryukov. fixes #20793.
Built from https://develop.svn.wordpress.org/trunk@25127


git-svn-id: http://core.svn.wordpress.org/trunk@25107 1a063a9b-81f0-0310-95a4-ce76da25c4cd