add routes to get/set solr config

src/mail.js

@@ -668,7 +668,6 @@ function configureMail(mailFqdn, mailDomain, callback) {
                             --memory-swap ${memoryLimit * 2}m \
                             -e CLOUDRON_MAIL_TOKEN="${cloudronToken}" \
                             -e CLOUDRON_RELAY_TOKEN="${relayToken}" \
-                            -e CLOUDRON_FTS="true" \
                             -v "${paths.MAIL_DATA_DIR}:/app/data" \
                             -v "${paths.PLATFORM_DATA_DIR}/addons/mail:/etc/mail" \
                             ${ports} \