Javadoc
Override the HTTP/2 authority the channel claims to be connecting to. This is not
generally safe. Overriding allows advanced users to re-use a single Channel for multiple
services, even if those services are hosted on different domain names. That assumes the
server is virtually hosting multiple domains and is guaranteed to continue doing so. It is
rare for a service provider to make such a guarantee. At this time, there is no security
verification of the overridden value, such as making sure the authority matches the server's
TLS certificate.