Milter-greylist

>The fix is in 1.5.1, so everyone can test if it's okay.

sync is ok (greylist.db on MXes are identical), but "Unexpected reply "add"
from..." still appear in syslog:

Jun 17 11:57:41 intra2 milter-greylist: [ID 829402 mail.info] Incoming MX
sync connexion from 192.168.3.34
Jun 17 12:09:54 intra1 milter-greylist: [ID 699817 mail.info] Connection to
192.168.3.35 established
Jun 17 12:09:54 intra1 milter-greylist: [ID 421412 mail.error] Unexpected
reply "add" from 192.168.3.35, closing connexion (5 entries queued)