This is a stop-gap measure until we can be sure we do FI_PROGRESS_MANUAL correctly.

include component name/index and properly print protocol version

also adds endpoint list printing mechanism

Preparations for maestro_endpoint_descriptor relying on protobuf-based
data structures; creating and serializing it already done, but not
exposed to rest of code yet.

avoids string-based OOB representation for those who can deal with uint32_t