Fixes two security holes: 'xdr'-bug (in vos, not in arlad), and
xfs failes to check for negative numbers in pioctl.
Additional changes: NetBSD/sparc64 now supported, 'themis' added,
local locking, bug fixes.
See http://www.stacken.kth.se/lists/arla-drinkers/2002-08/msg00019.html