FIX: Allow jailed configurations to use correctly use base configurations that use a different "default" marker object. Jailed configurations assumed that their "default" marker object is identical to the "default" marker object in the unjailed base configuration. This is not always true, especially if "_JailedConfiguration.rebind()" is used. Removed the explicit "default" keyword argument and passed the complete keywords argument dictionary to the base instead. This triggers correct default handling in the base.

--- a/CHANGES.txt	Tue Dec 07 15:43:09 2021 +0100
+++ b/CHANGES.txt	Thu Dec 09 13:02:17 2021 +0100
@@ -12,6 +12,16 @@
 Pre-1.0 Series
 --------------
 
+n/a (not yet)
+~~~~~~~~~~~~~
+
+- **[bugfix]**
+  Jailed configurations assumed that their "default" marker object is
+  identical to the "default" marker object in the unjailed base
+  configuration.  This is not always true, especially if
+  :py:meth:`~configmix.config._JailedConfiguration.rebind` is used.
+
+
 0.18 (2021-12-02)
 ~~~~~~~~~~~~~~~~~