Inline documentation fixes related to the `determine_current_user` filter

See #26706, #27700.

Built from https://develop.svn.wordpress.org/trunk@28007


git-svn-id: http://core.svn.wordpress.org/trunk@27837 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Gallery Views: Avoid JS errors when image attachments lack metadata.

props gcorne.
fixes #27691.

Built from https://develop.svn.wordpress.org/trunk@28008


git-svn-id: http://core.svn.wordpress.org/trunk@27838 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Formally deprecate wpmu_current_site().

props jeremyfelt.
fixes #27702.

Built from https://develop.svn.wordpress.org/trunk@28009


git-svn-id: http://core.svn.wordpress.org/trunk@27839 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve inline documentation for functionality in wp-includes/plugin.php added in 3.9.

See #14994, #27700.

Built from https://develop.svn.wordpress.org/trunk@28010


git-svn-id: http://core.svn.wordpress.org/trunk@27840 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a missing `@since 3.9.0` to the PHPDoc for `wp_register_plugin_realpath()`.

See #16953, #27700.

Built from https://develop.svn.wordpress.org/trunk@28011


git-svn-id: http://core.svn.wordpress.org/trunk@27841 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: show an error in the console when a plugin attempts to use the 'wpdialogs' plugin but wpdialog.js is not enqueued, fixes #16284
Built from https://develop.svn.wordpress.org/trunk@28012


git-svn-id: http://core.svn.wordpress.org/trunk@27842 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widget Customizer: Update icons to new Dashicons, part 2.

props Michael Arestad.
fixes #27400.
Built from https://develop.svn.wordpress.org/trunk@28013


git-svn-id: http://core.svn.wordpress.org/trunk@27843 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix PHPDoc formatting for `WP_Rewrite::add_endpoint()`.

See #27700.

Built from https://develop.svn.wordpress.org/trunk@28014


git-svn-id: http://core.svn.wordpress.org/trunk@27844 1a063a9b-81f0-0310-95a4-ce76da25c4cd
PHPDoc fixes for `wp_validate_logged_in_cookie()`, introduced in 3.9.

See #27700.

Built from https://develop.svn.wordpress.org/trunk@28015


git-svn-id: http://core.svn.wordpress.org/trunk@27845 1a063a9b-81f0-0310-95a4-ce76da25c4cd