Add nginx detection to the Permalink Settings screen.

Introduces got_url_rewrite() and a corresponding filter, which should now be used in lieu of the got_rewrite filter in got_mod_rewrite().

This does not write or even suggest nginx configuration; rather, it prevents nginx from being considered as either Apache or as an unrecognized server.

props johnbillion.
fixes #25098.

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git-svn-id: http://core.svn.wordpress.org/trunk@25377 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Clarify a string in Network Dashboard help text. props DrewAPicture. see #23163.
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git-svn-id: http://core.svn.wordpress.org/trunk@25378 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update inline documentation for l10n functions. props CharlesClarkson, DrewAPicture. fixes #16750.
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git-svn-id: http://core.svn.wordpress.org/trunk@25379 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Only focus the title field when it is empty. Remove ancient code that provided for an alternate condition.

props scruffian for initial patches.
props helen.
fixes #24423.

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git-svn-id: http://core.svn.wordpress.org/trunk@25380 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Allow the value attribute for list items processed by kses.

props kraftbj.
fixes #24293.

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git-svn-id: http://core.svn.wordpress.org/trunk@25381 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Check if the post type supports title. see #24423.
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git-svn-id: http://core.svn.wordpress.org/trunk@25382 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Update jQuery Form to 3.37.0 (unused in WP core).

props usermrpapa.
fixes #23944.

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git-svn-id: http://core.svn.wordpress.org/trunk@25383 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Make sure quick edited non-alternate taxonomy list table rows don't become alternate. props c3mdigital. fixes #25059.

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git-svn-id: http://core.svn.wordpress.org/trunk@25384 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add documentation for the new flush_rewrite_rules_hard filter. fixes #23491.

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git-svn-id: http://core.svn.wordpress.org/trunk@25385 1a063a9b-81f0-0310-95a4-ce76da25c4cd
If the script_loader_src filter returns nothing, bail instead of printing <script src="">.

props niallkennedy.
fixes #22470.

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