===Python API===

Added NULL constraint (and fixed bug that didn't allow appending FLOOR
constraint), and added support for Constraint.Settings.LOCAL key support in
COPYLOC, COPYROT and COPYSIZE constraints when target object is an armature.

source/blender/python/api2_2x/doc/Constraint.py

@@ -31,7 +31,7 @@ Or to print all the constraints attached to each bone in a pose::
 @var Type: Constant Constraint dict used by L{ConstraintSeq.append()} and 
   for comparison with L{Constraint.type}.  Values are
   TRACKTO, IKSOLVER, FOLLOWPATH, COPYROT, COPYLOC, COPYSIZE, ACTION,
-  LOCKTRACK, STRETCHTO, FLOOR
+  LOCKTRACK, STRETCHTO, FLOOR, NULL
 
 @type Settings: readonly dictionary
 @var Settings: Constant dict used for changing constraint settings.
@@ -82,6 +82,7 @@ Or to print all the constraints attached to each bone in a pose::
   - Used by Copy Location (COPYLOC), Copy Rotation (COPYROT), and Copy Size
   (COPYSIZE) constraint:
     - COPY (bitfield): any combination of COPYX, COPYY and COPYZ
+    - LOCAL (bool): Only for constraints which Armature targets.
 
 """