refactor: generalize auth_settings

etc/webfused.conf

@@ -27,5 +27,17 @@ authentication:
 
 filesystems:
 (
-    {name = "test",  mount_point = "/tmp" }
+    {name = "test",  mount_point = "/tmp/webfused" }
 )
+
+log:
+{
+    provider: "syslog"
+    level: "warning"
+    settings:
+    {
+        ident = "webfused"
+        facility = "daemon"
+        log_pid = true
+    }
+}