Twenty Fifteen: only escape HTML attribute output with `esc_attr()`. See #30133, props ocean90.
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git-svn-id: http://core.svn.wordpress.org/trunk@30081 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't hardcode `height` for videos - this was a workaround for MediaElement internals causing problems. Responsive videos now work properly and don't cause extra whitespace.

Fixes MediaElement by hand in the interim: https://github.com/johndyer/mediaelement/pull/1337
Video playlists were completely broken by this.

Fixes #30078.


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git-svn-id: http://core.svn.wordpress.org/trunk@30082 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow developers to override the `settings.success` callback for MediaElement players.

Props nofearinc.
Fixes #30029.

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git-svn-id: http://core.svn.wordpress.org/trunk@30083 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Support multiple 'status' values in `WP_Comment_Query`.

This change required turning the SQL concatenation into the generation of an
array, for greater flexibility.

Props karpstrucking, ebinnion.
Fixes #29612.
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git-svn-id: http://core.svn.wordpress.org/trunk@30084 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve global variable setting in `setup_postdata()`.

`setup_postdata()` is responsible for setting a number of global variables
that are used for post pagination (`$pages`, `$page`, `$nextpage`) and the
generation of post excerpts (`$more`). These variables should be sensitive to
the currently running instance of `WP_Query` - rather than the main query -
so that these features work properly inside of secondary `WP_Query` loops.

This changeset moves the logic of `setup_postdata()` into a method on `WP_Query`,
and converts `setup_postdata()` to a wrapper.

Props boonebgorges, wonderboymusic.
See #25349.
Fixes #9256, #20904.
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git-svn-id: http://core.svn.wordpress.org/trunk@30085 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Be more specific in documentation of 'slug' param for `get_terms()`.

Props jfarthing84.
Fixes #23636.
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git-svn-id: http://core.svn.wordpress.org/trunk@30086 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct some logic to populate the `defaultValue` variable when `data.defaultValue` begins with a hash symbol.

Props antpb
Fixes #30125

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git-svn-id: http://core.svn.wordpress.org/trunk@30087 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce `'pre_delete_term'` hook.

Props cmmarslender.
Fixes #30127.
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git-svn-id: http://core.svn.wordpress.org/trunk@30088 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Increase both mystery and humanism
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git-svn-id: http://core.svn.wordpress.org/trunk@30089 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Revert [28610] in order to avoid infinite redirect loops on reverse proxies which proxy from HTTPS to HTTP. This will be revisited at some point, possibly as an option via a filter.

Fixes #28610.

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git-svn-id: http://core.svn.wordpress.org/trunk@30090 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce some actions and filters which aid plugins in revisioning post meta.

 * `wp_save_post_revision_post_has_changed` filter which can be used to determine if a post has been changed, and therefore if a revision should be created for a post.
 * `wp_get_revision_ui_diff` filter which can be used to filter the fields displayed in the post revision diff UI.
 * `wp_creating_autosave` action which is fired just before an autosave is created.

See #20564.
Props mattheu, adamsilverstein.

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git-svn-id: http://core.svn.wordpress.org/trunk@30091 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Comment Template Tags: Improve the availability of context information in comment template tag filters.

Fixes #22380 props momo360modena, tareq1988.

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Support an empty string passed as a status in `WP_Comment_Query`.

The changes in [30084] broke backward compatibility with interfaces that
manually passed an empty string for the value of 'status', such as on
wp-admin/edit-comments.php.

Fixes #29612.
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git-svn-id: http://core.svn.wordpress.org/trunk@30093 1a063a9b-81f0-0310-95a4-ce76da25c4cd