Update Dashicons to latest. Adds line break, paragraph, code, and bbPress.

props empireoflight, melchoyce.
see #26936.

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git-svn-id: http://core.svn.wordpress.org/trunk@26934 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: update to 4.0.16, see #24067.
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git-svn-id: http://core.svn.wordpress.org/trunk@26935 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Let the video shortcode accept a YouTube URL as the value of its `src` attribute, as MediaElement.js supports Chromeless YouTube videos by using a pseudo-mime-type `video/youtube`. 

HTTP and HTTPS www, non-www, and short url fronts are supported:
http://www.youtube.com/watch 
https://www.youtube.com/watch
http://youtube.com/watch
https://youtube.com/watch
http://youtu.be
https://youtu.be

Fixes #24764.


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git-svn-id: http://core.svn.wordpress.org/trunk@26936 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove `$force` argument from `WP_Object_Cache::delete()`. From @nacin: "This was for internal-use-only, I don't think _deprecated_argument() is needed, but let's put a comment somewhere just so we know we'd have to be careful if we ever want to add a third argument here later."

`$force` argument has been removed, and docs were updated.

Fixes #22478.


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git-svn-id: http://core.svn.wordpress.org/trunk@26937 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add arguments to the wp_dropdown_cats filter, and docs.

props olivM.
fixes #24103.

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git-svn-id: http://core.svn.wordpress.org/trunk@26938 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure the last separator is removed from the user and network admin menus.

props johnjamesjacoby.
fixes #25425.

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git-svn-id: http://core.svn.wordpress.org/trunk@26939 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix an error in SQL generation when `perm` is set and an array is passed for `post_status`. Adds unit test.

Props oso96_2000.
Fixes #25523.


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git-svn-id: http://core.svn.wordpress.org/trunk@26940 1a063a9b-81f0-0310-95a4-ce76da25c4cd
New resetpass_form hook in wp-login.php.

props romaimperator.
fixes #21044.

Built from https://develop.svn.wordpress.org/trunk@27068


git-svn-id: http://core.svn.wordpress.org/trunk@26941 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use get_current_user_id() instead of $user_ID in user-edit.php.

props kovshenin.
fixes #26274.

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git-svn-id: http://core.svn.wordpress.org/trunk@26942 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update @return statement of wp_nonce_url(): The URL is escaped.

props c3mdigital.
see #4221.
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git-svn-id: http://core.svn.wordpress.org/trunk@26943 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WP_Link: convert < > and " to HTML entities when setting link title for the Text editor. Fixes #25704.
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git-svn-id: http://core.svn.wordpress.org/trunk@26944 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure compatibility with MySQL 5.6 which has stricter SQL modes by default.

Disables NO_ZERO_DATE, ONLY_FULL_GROUP_BY, STRICT_TRANS_TABLES, STRICT_ALL_TABLES, TRADITIONAL. Introduces wpdb::set_sql_mode() with an incompatible_sql_modes filter so a plugin can alter the set mode after the fact.

props pento.
fixes #26847.

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git-svn-id: http://core.svn.wordpress.org/trunk@26945 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Throw an incorrect usage notice when the query argument of wpdb::prepare() does not include a placeholder.

props ounziw.
fixes #25604.

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git-svn-id: http://core.svn.wordpress.org/trunk@26946 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a comment for [27073] as someone will inevitably complain it is tricked by % in a string. see #25604.

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git-svn-id: http://core.svn.wordpress.org/trunk@26947 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When the MySQL server has "gone away," attempt to reconnect and retry the query.

props pento.
see #5932.

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git-svn-id: http://core.svn.wordpress.org/trunk@26948 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove an unnecessary variable passed to wpdb::prepare() during multisite load.

props jeremyfelt.
fixes #26941.

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git-svn-id: http://core.svn.wordpress.org/trunk@26949 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Consistently trim and unslash search queries for the users list tables.

props aubreypwd.
fixes #26115.

Built from https://develop.svn.wordpress.org/trunk@27077


git-svn-id: http://core.svn.wordpress.org/trunk@26950 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Editor: add :focus style for the Quicktags buttons, fixes #26932
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git-svn-id: http://core.svn.wordpress.org/trunk@26951 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Open previews of different posts in different windows/tabs. Prevent confusion when using a former preview window again if the user navigated to edit another post. If the first post is still being edited, clicking Preview there will use the current window to show the preview. Props ippetkov, fixes #20233.
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git-svn-id: http://core.svn.wordpress.org/trunk@26952 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Consolidate "close on Escape" in the media modal, DFW, wpLink and Thickbox. Props kovshenin, fixes #26854.
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git-svn-id: http://core.svn.wordpress.org/trunk@26953 1a063a9b-81f0-0310-95a4-ce76da25c4cd