Add ham/spam cutoff parameters to spamfilter

Dockerfile

@@ -54,6 +54,8 @@ ENV NON_SMTPD_MILTERS="\$smtpd_milters"
 ENV MILTER_DEFAULT_ACTION=accept
 ENV INTERNAL_MAIL_FILTER_CLASSES=bounce
 ENV BOGOFILTER_ENABLE="yes"
+ENV BOGOFILTER_HAM_CUTOFF="0.499999"
+ENV BOGOFILTER_SPAM_CUTOFF="0.499999"
 
 # TODO: template access lists
 
@@ -106,7 +108,7 @@ RUN echo "_dev_null: /dev/null" > /etc/aliases \
      scache/unix/chroot=n
 
 ADD confd /etc/confd/
-ADD postmap_all spamfilter /usr/local/bin/
+ADD postmap_all /usr/local/bin/
 
 VOLUME ["/ssl","/var/spool/postfix"]
 EXPOSE 25/tcp 587/tcp