rxkad ticket5 function rewriting

rxkad ticket5 function rewriting

avoid conflicting with heimdal in environments where we might
need bits of their asn1 library also

Reviewed-on: http://gerrit.openafs.org/4834
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit a00b11221b559aee9a3412b78757173abeabaf77)

Change-Id: I127b34f8575bf3ff156d6a724cb2fa2312cc2154
Reviewed-on: http://gerrit.openafs.org/5478
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>