WP_Link: convert < > and " to HTML entities when setting link title for the Text editor. Fixes #25704.
Built from https://develop.svn.wordpress.org/trunk@27071


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.

Built from https://develop.svn.wordpress.org/trunk@27072


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.

Built from https://develop.svn.wordpress.org/trunk@27073


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.

Built from https://develop.svn.wordpress.org/trunk@27075


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.

Built from https://develop.svn.wordpress.org/trunk@27076


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