Merge "Inform the DNS resolver when it needs to do DNS64 synthesis." am: eed51faa49 am: f5a5cd3bd7

Change-Id: I06278ddff31d8c0dbb4ce6cfded01a38369d8a3c
tree: 6c93356e8743104da573db20c4c446c267e841c6
  1. core/
  2. services/
  3. tests/