doc: Document new rxgk options
Commit
e5b1e6f1 (Add rxgk client options to vl and pt utilities) added
a couple of new command-line options related to rxgk, but didn't add
them to the relevant man pages.
Add a brief description of these new options to the manpages for pts,
vos, ptserver, and vlserver.
Change-Id: I2d9bfdeb0a31d396740ca2a4d42e14c025b6f79e
Reviewed-on: https://gerrit.openafs.org/13947
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Tested-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>