make openafs 1.6.3pre1

prerelease for 1.6.3

Change-Id: I8eb600cdc0ed55d15e928a9f165f68d3ff924f82
Reviewed-on: http://gerrit.openafs.org/9858
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Ken Dreyer <ktdreyer@ktdreyer.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>