@since: 3.7.0

Prepares and sends an email of a full log of background update results, useful for debugging and geekery.

Whether the entire automatic updater is disabled.

Check for version control checkouts.

Tests to see if we can and should update a specific item.

Notifies an administrator of a core update.

Update an item, if appropriate.

Kicks off the background update process, looping through all pending updates.

If we tried to perform a core update, check if we should send an email, and if we need to avoid processing future updates.

Sends an email upon the completion or failure of a background core update.