Add dovecot directories

src/freedombone

   if grep -Fxq "configure_imap" $COMPLETION_FILE; then
       return
   fi
+
+  # add directories if needed
+  if [ ! -d /usr/share/dovecot/protocols.d ]; then
+      mkdir -p mkdir -p /usr/share/dovecot/protocols.d
+  fi
+  if [ ! -d /etc/dovecot/conf.d ]; then
+      mkdir -p /etc/dovecot/conf.d
+  fi
+
   apt-get -y install dovecot-common dovecot-imapd
 
   if [ ! -d /etc/dovecot ]; then