Milter-greylist

Hi,

the attached patch (relative to 1.4) fixes 2 things:

- syslogging of expired autowhitelisted entries was wrong (logged the 
entry that triggered the expiration instead of the expired one)

- a more sublte problem with lazy autowhitelisting: I discovered this 
one with the german right extremist spams this weekend. In fact we want 
lazy whitelisting XOR subnet matching, not both at the same time (a lot 
too permissive).
-- 
Matthieu Herrb