Force SSL admin when siteurl is explicitly configured with HTTPS.

see #27954.

Built from https://develop.svn.wordpress.org/trunk@28674


git-svn-id: http://core.svn.wordpress.org/trunk@28492 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media modal documentation:

Add some clarity to default values for controllers.

Props ericlewis.
See #28459.


Built from https://develop.svn.wordpress.org/trunk@28675


git-svn-id: http://core.svn.wordpress.org/trunk@28493 1a063a9b-81f0-0310-95a4-ce76da25c4cd