Add support for configuration of MacOS 10.9 "Mavericks".

Based on work originally done by Matt Haught <dmhaught@ncsu.edu>

Reviewed-on: http://gerrit.openafs.org/10538
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit aac384b2eda823519780afed84e53a868561711d)

Change-Id: Ic15fefc11e7b2f1170cb5ff52a94c1d6aea499a7
Reviewed-on: http://gerrit.openafs.org/10541
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>