to make proxy.StreamDirector return an array of grpcClientConnection

[abhishekkarigar]

currently the proxy.StreamDirector returns single grpc.ClientConn.
what if i need to return multiple grpc ClientConn at once. this support needs to be added.

current supported:
type StreamDirector func(ctx context.Context, fullMethodName string) (context.Context, *grpc.ClientConn, error)

Required
type StreamDirector func(ctx context.Context, fullMethodName string) (context.Context, []*grpc.ClientConn, error)

[abhishekkarigar]

@mwitkow

[vtolstov]

why we need to return multiple connections at once ?