Use a float for last_changed microtime cache values.

microtime() by default returns a string with a space, which isn't allowed for keys in some cache backends.

props _jameslee, drozdz.
fixes #27000. see #23448.

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git-svn-id: http://core.svn.wordpress.org/trunk@26982 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix typo in wp_set_auth_cookie() description.

props drozdz.
fixes #27046.
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git-svn-id: http://core.svn.wordpress.org/trunk@26983 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix gap above static pages, props SergeyBiryukov. Fixes #26694.
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git-svn-id: http://core.svn.wordpress.org/trunk@26984 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: make sure `featured` tag is hidden on front-end views as expected. Add a check for the tag name in case we're using default values and the default ID of `0` does not match the term id of the `featured` tag.

Props obenland, fixes #26732.
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git-svn-id: http://core.svn.wordpress.org/trunk@26985 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use .screen-reader-text class instead of an alt attribute for overlay button labels on Themes screen.

props bramd.
fixes #26603 for trunk.
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git-svn-id: http://core.svn.wordpress.org/trunk@26986 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: delete the `featured_content_ids` transient on theme switch to make sure child themes can override the Featured Content quantity value. Also remove quantity parameter so child themes can change the amount of featured posts with `$max_posts`.

Props obenland, see #26660.
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git-svn-id: http://core.svn.wordpress.org/trunk@26987 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix unreachable links when the content area is shorter than the sidebar in smaller viewpoints. Props celloexpressions, see #26782.
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git-svn-id: http://core.svn.wordpress.org/trunk@26988 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: translate `featured` tag slug used to link to specific tags in Posts editor. See #26526.
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git-svn-id: http://core.svn.wordpress.org/trunk@26989 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: pinking shears.
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git-svn-id: http://core.svn.wordpress.org/trunk@26990 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix Ephemera Widget to avoid showing full post content when displayed in single post or page. Restore the global `$more` to its original value after the widget output to avoid any issues caused by changing a global variable.

Props obenland, mor10, Frank Klein. See #26961.
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git-svn-id: http://core.svn.wordpress.org/trunk@26991 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When a `term_id` matches in `_get_term_children()`, recurse through its children until there is no more depth in the hierarchy. Since `get_terms()` return terms with a `count` of `0` when their children are not empty, we must return all children so that `get_terms()` can check their count.

In [27108], #26903 was fixed, but only because we were using the example in the ticket, leaving out infinite depth for hierarchical taxonomies.

Adds unit tests, including `Tests_Term_getTerms::test_get_terms_seven_levels_deep()`.

Fixes #26903. Again.


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git-svn-id: http://core.svn.wordpress.org/trunk@26992 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add some inline docs to `media-views.js` and remove some unnecessary comments from a few `super` calls.

Props gcorne.
See #26870.


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git-svn-id: http://core.svn.wordpress.org/trunk@26993 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce `maybe_regenerate_attachment_metadata( $attachment )`. On the Edit Media screen, call it for Audio and Video files.

The functions checks if the item is lacking metadata altogether. If a video or audio file was uploaded prior to 3.6, it does not have any metadata. This tries to fix it. Implements locking via a transient to protect against this running in parallel with another request.

This is the minimum viable product for #26825, but leaving the ticket open unless this function needs to be called in other places.

See #26825.


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git-svn-id: http://core.svn.wordpress.org/trunk@26994 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce `has_image_size( $name )`, a utility function that helps avoid loading the `$_wp_additional_image_sizes` global.

Props mordauk.
Fixes #26951.


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git-svn-id: http://core.svn.wordpress.org/trunk@26995 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add remove_image_size() and tests for it and has_image_size(), added in [27128].

props mordauk, markoheijnen.
fixes #26768. see #26951.

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git-svn-id: http://core.svn.wordpress.org/trunk@26996 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a filter `wp_insert_attachment_data` in `wp_insert_attachment()`. This is similar to the `wp_insert_post_data` filter in `wp_insert_post()`.

Fixes #20547.


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git-svn-id: http://core.svn.wordpress.org/trunk@26997 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Various JSHint fixes. see #26446.

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git-svn-id: http://core.svn.wordpress.org/trunk@26998 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve parameter documentation of add_meta_box().

props philiparthurmoore, DrewAPicture.
fixes #26698.

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git-svn-id: http://core.svn.wordpress.org/trunk@26999 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add meetup.com oEmbed support. see #23171.

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git-svn-id: http://core.svn.wordpress.org/trunk@27000 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix validation issue in get_the_password_form() caused by wpautop().

props andykeith.
fixes #27071.
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