Upgrade object for upgrades that need to be tracked and listed in the admin area. More...

Detailed Description

Upgrade object for upgrades that need to be tracked and listed in the admin area.

Represents an upgrade that runs outside of the upgrade.php script. These are listed in admin/upgrades and allow for ajax upgrades.

Note: The "upgrade_url" private setting originally stored the full URL, but was changed to hold the relative path from the site URL for #6838

private