Inline documentation for hooks in wp-admin/update.php.

Props ninio, kpdesign.
Fixes #25723.

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Inline documentation for hooks in wp-admin/network/site-settings.php.

Props admiralthrawn.
Fixes #25725.

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Consolidate logic for not showing a taxonomy meta box. props ocean90. fixes #21543.

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Query stopwords: Only eliminate single A-Z letters as search terms.

Stop trying to match any single letters that are not East Asian characters, as this requires PCRE with UTF-8 support; and because it doesn't actually work.

fixes #25709.

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When an HTTPS request to api.wordpress.org fails, try an insecure HTTP request and issue a warning.

Certain versions of cURL appear to claim OpenSSL support but fail to work. We need to not trap users on older versions while we work this out, and instead fall back to an insecure request.

see #25716 for trunk.

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Add a $taxonomy argument to each of the adjacent post functions.

Each took an array of category (IDs) when to search. Those can now be term IDs and each function now has $taxonomy = 'category' as an optional argument.

Functions affected: get_previous_post(), get_next_post(), get_adjacent_post(), get_adjacent_post_rel_link(), adjacent_posts_rel_link(), next_post_rel_link(), prev_post_rel_link(), get_boundary_post(), get_previous_post_link(), previous_post_link(), get_next_post_link(), next_post_link(), get_adjacent_post_link(), adjacent_post_link().

props ethitter.
finally fixes #17807.

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Add jshintrc to qunit.

props jorbin.
see #25187.

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Inline documentation for hooks in wp-admin/nav-menus.php.

Props pauldewouters for the intial patch.
Fixes #25528.

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Inline documentation for hooks in wp-admin/network/edit.php and wp-admin/network/users.php.

Props aralbald for the initial patch.
Fixes #25728.

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Twenty Fourteen: JavaScript fixes after running jshint, see r25960:

 * Enforce `===` instead of `==`
 * Fix confusing use of `!`
 * Remove unused variables like `calcNext`, defined but never used
 * Proper use of braces
 * Move functions out of if/else statements
 * Document unknown functions as Microsoft-specific
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Explicitly globalize $is_nginx in vars.php.

props johnjamesjacoby.
fixes #25776.

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Correct $user_id parameter description. props mauryaratan, Corphi. fixes #25774.
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Twenty Fourteen: second pass at revamping the main CSS file. Update pattern graphics to fix issue with orientation changes on tablets. Props iamtakashi, fixes #25592.
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Twenty Fourteen: revamp the RTL stylesheet and related cleanup. Props iamtakashi, see #25801.
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Fall back to comment author email in get_avatar() if the user who left the comment no longer exists.

props mauryaratan, lite3.
fixes #25803.
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Pass comment ID and comment post ID to get_comment_class() in WP_Comments_List_Table::single_row().

props drozdz.
fixes #25814.
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Twenty Thirteen: capitalize "Not Found" string for use in a page title, see #24891 and r25907.
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Twenty Fourteen: update bundled Genericons to the latest version, 3.0.2. Props iamtakashi, closes #25812.
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`WP_UnitTestCase::go_to()` tried its best to clean up global space, but ultimately fell short. Because it was blowing away `WP` every time it was called, it was dropping all the query vars that were registered for custom taxonomies and custom post types (ouch).

Introduces `_cleanup_query_vars()`. This is a prerequisite for the unit tests on #20767. All unit tests pass with this change.

See #20767.
Fixes #25818.


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Category and tag are typically checked before checking for a custom taxonomy. If the global query matches category or tag (even if it also has tax_query set), return category/tag as the queried object, instead of arbitrarily returning the first term in the `tax_query` stack (typically those added with 'pre_get_posts').

Real world example: http://www.emusic.com/17dots/topics/daily-download/ - "tag" page, regionalized for US-only content using `pre_get_posts` passing in the terms "US" and "ALL" for "region" (custom tax). All of the theme functions would output "ALL" as the term name. Even though it was a tag archive, the queried object was an arbitrary term from `tax_query`.

See [26006]. All unit tests pass.
Fixes #20767.



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