Corruption in xenstored tdb file?

[Brian Buhrow]

	hello Roger.  I've successfully compiled the kernel with your patch and installed it.
Now, both the NetBSD-5 and NetBSD-current VM's boot with full working networks.  
Also, FreeBSD-12 works as a a pvh guest with full networking.
I applied your patch to 12-stable, so if you commit this fix, if you could request a pullup to
FreeBSD-12, that would be great!
-thanks
-Brian