Remove documentation of 'program'

This tool was removed in 2006 in commit
b405868ca02880207bda1ec6eb4e21c7b0ac250c. Also remove mention of
wsadmin, removed at the same time.

Change-Id: I8475b951f576f10ddd2f4b72565354b9fba41d94
Reviewed-on: http://gerrit.openafs.org/11554
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>