In wp-login.php check if cookies are enabled before attempting to log the user in with wp_signon(), fixes #24961.
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git-svn-id: http://core.svn.wordpress.org/trunk@25032 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WP_HTTP: Cookies: When following redirects, include the request cookies in the redirected requests. Fixes #24987

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git-svn-id: http://core.svn.wordpress.org/trunk@25033 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make use of the recursive option in mkdir() in wp_mkdir_p(). Avoids a bunch of silenced PHP Notices being logged. Fixes #23196

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WP_Upgrader: Don't activate maintenance mode in bulk_upgrade() when no Themes or Plugins are specified. This doesn't affect Core, but rather, plugins who use the upgrade routines and do not do precautionary tests. Props jamescollins. Fixes #24496

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