commit 5dba5c95fcbe3a70fe03dca3afc6066d19d9aef5
author Todd Wang <toddw@google.com> Thu Aug 27 19:34:26 2015 -0700
committer Todd Wang <toddw@google.com> Thu Aug 27 19:34:26 2015 -0700
tree 8cb37cb044a137b7276b5b1d188e4563445fee57
parent 96f300a174a7bdc3b0d9c8d652c4f37acef57220

runtime/internal/rpc: Add initial xserver, based on v23/flow.

I started with Matt's xserver.go, which started as a copy of
server.go, deleting stuff that was obviously not necessary, and
changing the code to be based on the flow package.  The code
compiles, but no testing has been performed, and there are TODOs
littered throughout for stuff that we'll need to fix for sure.

Patchset 0 represents the raw copy from server.go to xserver.go,
and patchset 1 represents my edits.

Change-Id: I3a7558c582a425d5b974258dfb5ce96d5807d185