Save additional domain codes

src/freedombone-config

                     if [ ! $VALID_CODE ]; then
                         DEFAULT_DOMAIN_NAME=
                         EMAIL_DOMAIN_CODE=
+                    else
+                        write_config_param "EMAIL_DOMAIN_CODE" "$EMAIL_DOMAIN_CODE"
                     fi
                 fi
                 if [ $XMPP_DOMAIN_CODE ]; then
                     if [ ! $VALID_CODE ]; then
                         DEFAULT_DOMAIN_NAME=
                         XMPP_DOMAIN_CODE=
+                    else
+                        write_config_param "XMPP_DOMAIN_CODE" "$XMPP_DOMAIN_CODE"
                     fi
                 fi
             else