In various areas of DA, such as restores, a reload or reread of proftpd may be requested, via the task.queue. If you're running pure-ftpd, then we'd have no reason to see the proftpd commands there. The change will swap the "proftpd" action with "pure-ftpd". A secondary check will be run, such that if pure-ftpd reload or reread are called, they're ignored. An HUP sent to pure-ftpd will kill it, as it does not use HUP in the normal fashion. This does not affect the action=rewrite&value=pureftp_db calls.