An RPC test dispatch library for vice

An RPC test dispatch library for vice

A library framework for remote testing against file servers,
with the ability to establish multiple call/callback channel
pairs within a single test process and dispatch requests
arbitrarily on each.  Thanks to Derrick for design and debugging
help.  Additional callback processing intelligence will follow
in a future changeset.  This version builds on Windows NT (but
might need further adjustment).

Change-Id: Ibea39e912b2a23ebf58e9e0931114572eccf6e78
Reviewed-on: http://gerrit.openafs.org/2229
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>