remove obsolete fixme

src/reverseproxy.js

@@ -404,7 +404,6 @@ async function renewCert(fqdn, domainObject) {
         if (restartError) debug(`renewCert: error updating mail container on cert change: ${restartError.message}`);
     }
 
-    // FIXME: this doesn't work across processes. maybe directory server has to become a process of it's own
     if (domainObject.domain === settings.dashboardDomain() && getAcmeCertificatePathSync(settings.dashboardFqdn(), domainObject).certFilePath === acmePaths.certFilePath) {
         debug('renewCert: directory server certificate changed');
         const [reloadError] = await safe(shell.promises.exec('renewCert', 'systemctl reload --no-block box'));