Handle full database error

Turns out that, despite what mariushosting says, a Synology NAS does not "...have no problem with blocking as many IPs as you need." The limit is a bit over 6 million IPs for my ds916+. You can hit that limit pretty easily when lists using CIDR notation are used.

This release will add as many IPs as will fit, and if you hit the limit, it leaves out the remainder, leaving you with the close-to-max number of IPs in your AutoBlock database.