wpdb: set dbh to null when the mysqli connection fails. see #21663.

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git-svn-id: http://core.svn.wordpress.org/trunk@27133 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a constant to disable mysqli for testing purposes. see #21663.

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git-svn-id: http://core.svn.wordpress.org/trunk@27134 1a063a9b-81f0-0310-95a4-ce76da25c4cd
When failing to reconnect to a server that has gone away, simply fail the query once we've passed template_redirect, rather than wp_die(). 

props pento.
see #5932.

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git-svn-id: http://core.svn.wordpress.org/trunk@27135 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Decrement update count bubbles as plugins/themes are updated, live.

props gcorne, mitchoyoshitaka.
fixes #17703.

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git-svn-id: http://core.svn.wordpress.org/trunk@27136 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove title attributes on the fly when [27280] makes them incorrect. see #17703.

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git-svn-id: http://core.svn.wordpress.org/trunk@27137 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure disabled secondary buttons do not change background on hover or active.

props helen.
fixes #26785.

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git-svn-id: http://core.svn.wordpress.org/trunk@27138 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Pass the comment object to the get_comment_date and get_comment_time.

props SergeyBiryukov.
fixes #19849.

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git-svn-id: http://core.svn.wordpress.org/trunk@27139 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use placeholders in strings in wp_sprintf_l() to ensure spaces are not lost in translation.

props andy.
fixes #26651.

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git-svn-id: http://core.svn.wordpress.org/trunk@27140 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make get_adjacent_post() wrap a new WP_Get_Adjacent_Post object that uses WP_Query.

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git-svn-id: http://core.svn.wordpress.org/trunk@27141 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make get_adjacent_post() wrap a new WP_Get_Adjacent_Post object that uses WP_Query.

See [27285] for the actual commit, which misfired.

props ethitter!
fixes #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27142 1a063a9b-81f0-0310-95a4-ce76da25c4cd
We shall call it WP_Adjacent_Post instead. see #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27143 1a063a9b-81f0-0310-95a4-ce76da25c4cd
One more change. see #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27144 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unnecessary quotes from urls in CSS.

props TobiasBg.
fixes #22476.

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git-svn-id: http://core.svn.wordpress.org/trunk@27145 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Return 404 when querying author's posts who is not a member and has no posts on the site

fixes #20601. props yoavf, nacin, SergeyBiryukov, wonderboymusic, markjaquith.
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git-svn-id: http://core.svn.wordpress.org/trunk@27146 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add inline documentation for properties and other inline docs fixes for `WP_Adjacent_Post`.

See #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27147 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove now-moot vanity spacing for `WP_Adjacent_Post` property definitions.

See #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27148 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Document the `$taxonomy` property in `WP_Adjacent_Post`.

See #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27149 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce doing_filter() and doing_action() to identify hooks in progress.

did_action() returns true the moment a hook is initially run, leaving you no way to tell if the hook is still in progress. Hooks can be nested and this checks the entire stack, versus current_filter() which only identifies the final hook in the stack. This commit also introduces current_action() for parity.

To tell if a hook has completed, one can use did_action() and ! doing_action() together.

The functions do not require an argument. In that situation, they indicate whether the stack is empty.

props ericmann for the initial unit tests.
fixes #14994.

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git-svn-id: http://core.svn.wordpress.org/trunk@27150 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Set the taxonomy property in the WP_Adjacent_Post class. fixes #26937.

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git-svn-id: http://core.svn.wordpress.org/trunk@27151 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add a filter to remove or rename page templates for a theme. This does not yet handle adding page templates. see #13265.

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git-svn-id: http://core.svn.wordpress.org/trunk@27152 1a063a9b-81f0-0310-95a4-ce76da25c4cd