fix

Author: LukasAud

manifests/server/instance/config.pp

@@ -61,7 +61,7 @@
   Optional[String[1]]                       $log_line_prefix              = $postgresql::server::log_line_prefix,
   Optional[String[1]]                       $timezone                     = $postgresql::server::timezone,
   Optional[String]                          $password_encryption          = $postgresql::server::password_encryption,
-  String                                    $extra_systemd_config         = $postgresql::server::extra_systemd_config,
+  Optional[String]                          $extra_systemd_config         = $postgresql::server::extra_systemd_config,
 ) {
   if ($manage_pg_hba_conf == true) {
     # Prepare the main pg_hba file