Add Pattern-based request multiplexer
Add Pattern-based request multiplexer

ilius/grpc-gateway,ilius/grpc-gateway,mwitkow/grpc-gateway,gengo/grpc-gateway,improbable-io/grpc-gateway,dddaisuke/grpc-gateway,mwitkow-io/grpc-gateway,Lantame/grpc-gateway,DarkDNA/grpc-gateway,gengo/grpc-gateway,ilius/grpc-gateway,tmc/grpc-gateway,grpc-ecosystem/grpc-gateway,ceram1/grpc-gateway,improbable-io/grpc-gateway,Lantame/grpc-gateway,jonboulle/grpc-gateway,tmc/grpc-gateway