Synchronize libafsauthent afsconf_ exports with windows

Synchronize libafsauthent afsconf_ exports with windows

The Windows library was exporting several more afsconf_* symbols
than the Unix one; bring them into sync.

Reviewed-on: https://gerrit.openafs.org/13126
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit bcce41bd99b4361631b64cf4749d1dcf80df1cd7)

Change-Id: I4993395d30ca93d28e0ccd4c6ad52975a1e23324
Reviewed-on: https://gerrit.openafs.org/13178
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Joe Gorse <jhgorse@gmail.com>
Reviewed-by: Marcio Brito Barbosa <mbarbosa@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>