Windows: replace cm_allServersp list with osi_queue

Replace the cm_allServersp list with an osi_queue.  This simplifies
the Add/Remove functionality which will be required in case of VLDB
server uniquifier changes.

Change-Id: I6b118f2a27ee4bd2eb24011aae868865615eb09f
Reviewed-on: http://gerrit.openafs.org/10762
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Windows: cm_GetAddrsU wrapper for VL_GetAddrsU

cm_GetAddrsU() is a wrapper for the VL_GetAddrsU() RPC.  The initial
version is a bare bones replacement for the VL_GetAddrsU() call from
cm_UpdateVolumeLocation().  Future changes will add caching.

Change-Id: I7d51d98d8fd21b91f25424bdb795576ea44deab4
Reviewed-on: http://gerrit.openafs.org/10763
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>