Hi,

In Envoy VHDS implementation, :authority pseudo header is first converted 
to lower-case before Virtual Host name 
matching: 
https://github.com/envoyproxy/envoy/blob/v1.36.4/source/common/http/route_config_update_requster.cc#L13

Is there / will there be similar enforcements in gRPC xDS implementation as 
well? For the context, currently we do not enforce xDS resource name to be 
case-insensitive on our management server, and therefore, in our 
environment xds://FooService is different from xds://fooservice. If gRPC 
will standardize the behavior in the future, we will prepare for it 
accordingly.

Thanks,
Jeff

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