Waiting for GPG termination was tidied up. The
MASTER command was added for setting the master
server to slave from. Longer TLDs are now allowed
(6 characters instead of 4). The ADDUSER command
was added to allow new user creation via email.
Various minor code cleanups were done. The code is
reasonably mature now.
There are loads of changes in this release. The main feature enhancements are the addition of deletion support, and a separate users file. Minor security fixes in terms of checking of domain names, and locking of file access. If you're using a previous version, you really want to upgrade.