fix golint issues in zrpc (#531)

zrpc/internal/chainclientinterceptors.go

@@ -2,10 +2,12 @@ package internal
 
 import "google.golang.org/grpc"
 
+// WithStreamClientInterceptors uses given client stream interceptors.
 func WithStreamClientInterceptors(interceptors ...grpc.StreamClientInterceptor) grpc.DialOption {
 	return grpc.WithChainStreamInterceptor(interceptors...)
 }
 
+// WithUnaryClientInterceptors uses given client unary interceptors.
 func WithUnaryClientInterceptors(interceptors ...grpc.UnaryClientInterceptor) grpc.DialOption {
 	return grpc.WithChainUnaryInterceptor(interceptors...)
 }