Remove milter warnings about non-existant sockets
Jan 27 08:13:21 cat postfix/smtpd[1756]: warning: connect to Milter service unix:/run/clamav/milter.ctl: No such file or directory Jan 27 08:13:21 cat postfix/smtpd[1756]: warning: connect to Milter service unix:/var/run/opendkim/opendkim.sock: No such file or directory
(from redmine: created on 2016-01-27)