LINUX: Turn on AFS_NEW_BKG
AFS_NEW_BKG allows libafs to request the afsd background daemon
processes to do certain userspace operations. This is currently only
used on DARWIN for handling EXDEV file moves, but this framework can
be useful on LINUX, as well. So, turn it on for LINUX.
This commit does not introduce any new background operations for LINUX
to actually use; we're just turning on the new framework. Future
commits will introduce new background operations.
Change-Id: I5d371f85b87899ce6ab2d5e520954a893679d37e
Reviewed-on: https://gerrit.openafs.org/13284
Reviewed-by: Mark Vitale <mvitale@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>