add rsync instructions

bin/vmail-domains-exp.sh

@@ -93,9 +93,12 @@ if [[ "$domains_id" -gt '0' ]] ; then
       /usr/local/bin/vmail-roundcubemail-settings-export.php $domain
     fi
 
+    servername=`hostname -d`
+
     echo
     echo "Vmail configs for $domain have been exported."
-    echo "To migrate to a new server sync /var/vmail/$domain/ to the new server and on the new server run:"
+    echo "To migrate to a new server run these commands (as root) from the new server:"
+    echo "rsync -v --archive --relative --rsh=/usr/bin/ssh root@$servername:/var/vmail/$domain /"
     echo "vmail-domains-imp.sh -d $domain"
 
   else