Sysname and param.h for FreeBSD 9.2 and 11.0

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

Change-Id: Ic79ff26aa39e08940b6035770fe4c6f15b02c418
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>