Add a filter for wp_editor() settings.

props DH-Shredder, JPry, DrewAPicture.
fixes #24472.
Built from https://develop.svn.wordpress.org/trunk@28944


git-svn-id: http://core.svn.wordpress.org/trunk@28741 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use correct variable.

props azaozz.
see #24472.
Built from https://develop.svn.wordpress.org/trunk@28945


git-svn-id: http://core.svn.wordpress.org/trunk@28742 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Display a correct preview link for drafts when permalinks are disabled.

see #28350.
Built from https://develop.svn.wordpress.org/trunk@28946


git-svn-id: http://core.svn.wordpress.org/trunk@28743 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Simplify logic in get_sample_permalink_html(), remove duplicated code.

see #28350.
Built from https://develop.svn.wordpress.org/trunk@28947


git-svn-id: http://core.svn.wordpress.org/trunk@28744 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Simplify a condition in get_sample_permalink_html().

see #28350.
Built from https://develop.svn.wordpress.org/trunk@28948


git-svn-id: http://core.svn.wordpress.org/trunk@28745 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce an annotated list of oEmbed providers, their flavors, whether they support SSL, and when they were added to the `oembed_providers` filter docs.

See #28507.
Fixes #28372.

Built from https://develop.svn.wordpress.org/trunk@28949


git-svn-id: http://core.svn.wordpress.org/trunk@28746 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove duplicate of the 'oembed_providers' filter accidentally introduced in [28949].

Move annoted table of oEmbed providers into the existing filter docs.

See #28507.
Fixes #28372. 

Built from https://develop.svn.wordpress.org/trunk@28950


git-svn-id: http://core.svn.wordpress.org/trunk@28747 1a063a9b-81f0-0310-95a4-ce76da25c4cd