Introduce a send_core_update_notification_email filter to control whether to send update notifications.

Merges [25882] to the 3.7 branch.

Currently, this is dependent on whether the automatic updater is enabled (generally). This is likely to be decoupled in a future release.

This refocuses the auto_core_update_send_email filter to specifically be for success/fail emails for auto updates, while the new filter is more general.

see #25603.

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About page, updates section: Don't show a message on about.php if the updater is 100% disabled. Don't show it if the user can't update core. Don't show the email if notifications are disabled. New string.

Merges [25883] to the 3.7 branch.
see #25603.

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About page: Cache our zxcvbn calls and limit the variation of the animation.

Merges [25884] to the 3.7 branch.

Diff is mostly whitespace.

props jorbin, azaozz.
fixes #25603.

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3.7-RC2-25888

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Avoid notice with search feeds.

Merges [25889] to the 3.7 branch.

fixes #25677.

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Remove debug code from WP_Automatic_Updater::send_email().

Merges [25891] to the 3.7 branch.

props markmcwilliams for initial patch.
fixes #25678.

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Confirm delete_site_option() exists before calling it during an update.

This function won't yet exist when updating from 2.7 [sic].

Merges [25893] to the 3.7 branch.
fixes #25682.

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Always escape URLs at the last possible moment. for the 3.7 branch.

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Add editimage.min.js to $_old_files. see #24999. for the 3.7 branch.

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Maintain the same output for get_avatar() as 3.6. see [25896]. For the 3.7 branch.

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3.7.

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Bundled themes: bump version numbers (ignoring Twenty Ten).

Merges [25902] to 3.7.

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Update POT files for Twenty Ten through Twenty Thirteen, for 3.7.

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Twenty Thirteen: Restore the original "Not found" string. see #24891.

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Translator comments are special, make sure they are parsed properly. see #25256, for the 3.7 branch.

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POT update.

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The 3.7 branch is now 3.7.1-alpha

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Avoid a notice for an undefined $checksums variable when updating from pre-3.7 to post-3.7.

Merges [25915] to the 3.7 branch.

props GaryJ.
fixes #25689.

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3.7 regression: Fix the width of captioned images inserted into the visual editor.

Pulls some arithmetic outside of some string concatenation to avoid a nasty uglify.js regression: https://github.com/mishoo/UglifyJS2/pull/330.

Merges [25921] to the 3.7 branch.

props LucP.
fixes #25700.

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3.7 regression from [25119]: Have in_category() return false when the first argument is empty.

Merges [25923] to the 3.7 branch.

props ericlewis.
fixes #25706.

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