postgresql: Log to stderr by default.

Now systemctl status will properly pick up the right logs.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

modules/services/databases/postgresql.nix

@@ -29,7 +29,7 @@ let
     ''
       hba_file = '${pkgs.writeText "pg_hba.conf" cfg.authentication}'
       ident_file = '${pkgs.writeText "pg_ident.conf" cfg.identMap}'
-      log_destination = 'syslog'
+      log_destination = 'stderr'
       ${cfg.extraConfig}
     '';
 
@@ -66,13 +66,6 @@ in
         '';
       };
 
-      logDir = mkOption {
-        default = "/var/log/postgresql";
-        description = ''
-          Log directory for PostgreSQL.
-        '';
-      };
-
       dataDir = mkOption {
         default = "/var/db/postgresql";
         description = ''