Windows: fs checkserver skip multi-homed up server

Windows: fs checkserver skip multi-homed up server

Multi-homed file servers can be detected by comparing the
uuid for the cm_server_t entries.  If a server has at least
one up interface, do not list it as being down in the "fs checkserver"
response list.

Change-Id: I718eeee3316d05a33a4af97ca6c7fd947db41f44
Reviewed-on: http://gerrit.openafs.org/3603
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>