Sysname and param.h for FreeBSD 9.2 and 11.0

Sysname and param.h for FreeBSD 9.2 and 11.0

9.2 is newly released and HEAD is now 11-current.

On the 1.6 branch (unlike master), we still need to define
AFS_64BIT_ENV.

Reviewed-on: http://gerrit.openafs.org/10341
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 1b674ae30925c8459e1a5614e19562af460850d8)

Change-Id: Id5d5f2ca74cbdb816a759487e01aefb215894887
Reviewed-on: http://gerrit.openafs.org/10381
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>