util: add defines for ktime never and now values
Add preprocessor symbolic names for ktime values representing never and
right now. The names are intended to be consistent with the ktime date
never value definition. This commit does not make any functional
change.
Change-Id: Ia6735b585e50aeb018481f76552fbb4f607b8529
Reviewed-on: https://gerrit.openafs.org/13310
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>