! can: require services to respond to ChunkedRequestStart with RegisterChunkHandler, fixes #473
= can: SuspendReading for a bit more backpressure-safety while waiting for RegisterChunkHandler, refs #473
Merge pull request #593 from jrudolph/i/473/new-chunked-request-protocol

! can: require services to respond to ChunkedRequestStart with RegisterChunkHandler, fixes #473