When symmetrizing a bone using "Armature->Symmetrize" in Edit Mode, Settings on the pose bone were not symmetrized. This patch symmetrizes ONLY the setting mentioned in the bug report. (limit rotation Z) IMO other settings should be reviewed on a 1 by 1 basis. Do note that this assumes that the armature is symmetrized across the YZ-plane Pull Request: https://projects.blender.org/blender/blender/pulls/129004