Log Message:
Update to 0.3. Changes:

* Updated default timeouts
* Added support for matching IPs based on class-C (/24) address,
    rather than the full IP address - enabled by default
* Added support for whitelists
* Wait for the envelope before sending tempfail (helps for some buggy MTAs)
* Removed qgreylist-info script (doesn't work with new class-C greylisting)