woothemes/woocommerce — pull request #6543 by scottdurban (2014-10-15 14:22:58+00:00)
Title: Add 'woocommerce_order_status_on-hold_to_processing', to $email_actions

This addition would stop users from editing the core, as there is currently no eloquent way to edit the $email_actions array. Especially useful for creating email notifications for confirming payment (BACS).