InternalForwarderTransport and InternalClientTransport are a pair of forwarder-side
and client-side transports that can be connected with each other, so that link-layer
packets sent by one transport can be received by the other.
They are used together with LpFace, GenericLinkService, and ndn::Face to replace
InternalFace and InternalClientFace used by NFD management.
They also replace TopologyForwarderTransport and TopologyClientTransport used by
TopologyTester of forwarding unit tests.
refs #3225
Change-Id: I5b6b579c43dfd0b1b9def5100be2ce516219cb74
InternalFace is now exclusively for internal use by NFD's forwarding
pipelines. A separate InternalClientFace has been introduced, intended
to be used by the NFD internal applications, including FIB, Face, RIB
manager, and others.
Change-Id: I4a06b9d05b1613a456c6267582091924557d73be
Refs: #2107
Junxiao Shi
Yanbiao Li