Is sysinst broken by recent public-domain/xz commits?

[Paul Goyette <paul%vps1.whooppee.com@localhost>]

Ever since yesterday's commits to src/external/public-domain/xz/... I 
have been unable to get sysinst to unpack any distribution sets.  I'm 
using sysutils/anita to prepare a bootable amd64 cd-rom image, and other 
than build for amd64 vs i386, I'm following the instructions posted at
http://wiki.netbsd.org/kernel_debugging_with_qemu/

Sysinst tries to unpack kern-GENERIC.tgz but gets an error.  The message 
quickly flies off of the screen and is replaced by a generic "unpack of 
kern-GENERIC.tgz failed, should we continue?" message!  (I tried to 
rebuild an Xterm image with ALLOWLOGGING enabled, but I can't seem to 
figure out the magical incantation for that...)



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