* all: Upgrade listenerutil dependency
The new listenerutil implements http.Flusher, which is necessary
for streaming responses from the grpc-gateway to work.
* daemon/controller: Remove newline delimiter in streaming responses
The default gRPC-Gateway HTTPBody marshaler uses newlines
as a delimiter. This introduces newlines in our streamed responses.
Wrapping the default marshaler lets us define a nil delimiter, which
ensures our streaming responses are unaffected by the server side
chunking.
Johan Brandhorst-Satzkorn
cf412b95a2