Allow adding more parents to a DAG node.

This is used to track conflict resolutions that select (bless) an
existing object version instead of creating a new one.  Capturing
this info allows Sync to avoid a type of false conflict.

Change-Id: Ice6b1d53c37f1212aebfcf7c5add7d8fecb88f9f
3 files changed
tree: 1c0c7b947f9299a708af65ae803caebba6d5d22e
  1. examples/
  2. lib/
  3. runtimes/
  4. security/
  5. services/
  6. tools/