Sergey Biryukov 21a6c7b050 Cron API: Introduce wp_unschedule_hook() to clear all events attached to a hook.
This complements `wp_clear_scheduled_hook()`, which only clears events attached with specific arguments.

Props arena, mordauk, jrf.
Fixes #18997.

git-svn-id: https://develop.svn.wordpress.org/trunk@40965 602fd350-edb4-49c9-b593-d223f7449a82
2017-06-30 00:21:49 +00:00
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