Vert.x transport for gRPC

[vietj]

Such transport would provide an improved integration with gRPC (e.g providing SNI support, vertx security, vertx web router) and also would ease Netty upgrade as grpc-netty would not impose the Netty version to use.

[ctrlshp]

Can you give some pointers on how would one go about doing that without copying the whole grpc-netty code here? We are interested in GraalVM native image support, custom routing, SNI and runtime SSL certificate hot reloading. Thanks!

[ctrlshp]

Also, if we were interested in generating code for a gRPC service to be a bridge to a protobuffer-based Vert.x event bus, should we put the code here somewhere, as well?