Milter-greylist

Hi,

i've made a patch for SPF, it now support  lib_spf2 (aka lib_spf_alt),
you can configure it by the --with-libspf2=[DIR] like the old spf_alt.

a new syslog message is sent when the spf_check has failed

if someone use lib_spf, could it check that SPF_S_FAIL and SPF_H_FAIL 
are
the correct code for a failed check.

comment are wecolme as usual.

Regards