Support Envoy grpc match options

Hello

I use istio as grpc-web proxy in the virtual service. Everything is working well but sometimes I get this error:

E0501 04:32:57.218940230      12 http_server_filter.cc:218]  GET request without QUERY

After a search I found a workaround:

I was wondering you to implement it in istio as grpc does not seem to be an options of the match options of the virtual service (Istio / Virtual Service)