added CMSHook for postfix module and updated conf

CMSHook wil be inplemented so CMS releated Module configuration,
this wil be loaded when using appendCMS and the main intaller

SubModules/postfix/opendkim-init.sh

@@ -2,7 +2,7 @@ if [ -n "$1" ]; then
     if [[ "$1" = "--enable" ]]; then
         echo "Enableing DKIM"
 
-        echo "*@DOMAINname vps._domainkey.DOMAINname >>/etc/opendkim/SigningTable\
+        echo "*@DOMAINname vps._domainkey.DOMAINname" >>/etc/opendkim/SigningTable
         systemctl reload opendkim
         #Remove script
         while true; do