doc: pts manpage fixes

 - Mention the -help, -auth, -encrypt, and -config options for all pts
   commands in their synopsis

 - Add the -auth option to the pts.pod page

 - Reference the -auth, -encrypt, and -config options from all
   subcommand pts pages

 - pts_removeuser: Replace -name with -user

 - pts_sleep: Add missing -delay

 - pts_source: Add missing -file

Change-Id: I4f0889d661c46f6bdd2a9604d8423d809a632d2d
Reviewed-on: http://gerrit.openafs.org/10387
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>