am 59273ede: Re-add netd support for enabling IPv6 optimistic mode.

* commit '59273ede02fc91d2a3297547d959159c8c6f69f3':
  Re-add netd support for enabling IPv6 optimistic mode.
tree: 85b818b58d5a8a36f5b11a36ea9c51dfc99a0b08
  1. client/
  2. include/
  3. server/