veyron2/ipc: Support for granting credentials to servers in the form of blessings.

This change makes it possible for a client to provide additional credentials,
bound to the identity of the server, in the form of a blessed identity to
a server when making the request.

The server can access this credential via ipc.Context.Blessing.

Change-Id: I67dde80b7038b0ebb9b27f4917ae218b62ec13f0
8 files changed
tree: 9a52c8035c8b5c136ae6d6f0b29738121e1d6b4b
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/