4.6.1	25 MAR 2023	Bug fix release to fix race condition and XATTRs
			code

	1. Race condition which can cause corruption of the "fragment table"
	   fixed.  This is a regression introduced in August 2022, and it has
	   been seen when tailend packing is used (-tailends option).
	2. Fix build failure when the tools are being built without extended
	   attribute (XATTRs) support.
	3. Fix XATTR error message when an unrecognised prefix is found
	   (Christian Hesse).
	4. Fix incorrect free of pointer when an unrecognised XATTR prefix is
	   found.