WP_HTTP: Cookies: Fill the defaults for the Cookie object based on the current requested URL. Fixes #21182

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git-svn-id: http://core.svn.wordpress.org/trunk@25031 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In wp-login.php check if cookies are enabled before attempting to log the user in with wp_signon(), fixes #24961.
Built from https://develop.svn.wordpress.org/trunk@25045


git-svn-id: http://core.svn.wordpress.org/trunk@25032 1a063a9b-81f0-0310-95a4-ce76da25c4cd