Make OpenAFS 1.6.10pre1

prerelease for 1.6.10

Change-Id: I952c26f1a211fdb3f2055eafce15d93d943e28a5
Reviewed-on: http://gerrit.openafs.org/11354
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>