mod_user_account_management: Add support for soft-deletion of accounts via IBR When registration_delete_grace_period is set, accounts will be disabled for the specified grace period before they are fully deleted. During the grace period, accounts can be restored with the user:restore() shell command. The primary purpose is to prevent accidental or malicious deletion of a user's account, which is traditionally very easy for any XMPP client to do with a single stanza.