Windows: No network, no probe

Modify cm_PingServer and cm_CheckServersMulti to avoid probing servers
when there are no network interfaces with which to do so.  Just mark
the servers down.

Change-Id: I5ba6c9813a28ec44b09dccd8f8c5ffc7e0c0ce10
Reviewed-on: http://gerrit.openafs.org/11446
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: power management suspend/resume changes

1. Call cm_UpdateIFInfo() for all power management events to force
   an update of the valid network interface count.

2. Ensure that regardless of which Suspend and Resume events are
   generated that the service only suspends once and resumes once.

Change-Id: If0c2fe5b6a18dd6b7ee01b511378cb78837efa3d
Reviewed-on: http://gerrit.openafs.org/11447
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>