Windows: GiveUpAllCallBacks only if non-loopback

If the only ip addresses are known to be loopback addresses, then
do not waste time by attempting to GiveUpAllCallBacks during suspend
or shutdown.

Reviewed-on: http://gerrit.openafs.org/10429
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 3f5f3013e91de3fddaee96598ef0311f8f2d5e22)

Change-Id: I7280f8849aebce2435d45f77942efdddd5bdc1cc
Reviewed-on: http://gerrit.openafs.org/10466
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows; GetSystemTimeAsFileTime

As per Raymond Chen's "The Old New Thing" blog

  http://blogs.msdn.com/b/oldnewthing/archive/2013/11/01/10462403.aspx

Calling GetSystemTime() followed by SystemTimeToFileTime() performs
two format translations which can be avoided by using
GetSystemTimeAsFileTime() directly.

Reviewed-on: http://gerrit.openafs.org/10430
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit 727e951d8c49a98d2c37378c863cd050b8d768eb)

Change-Id: I89b25cdc25ac6b4e4e37d1c2da48575ed4a21393
Reviewed-on: http://gerrit.openafs.org/10467
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>