addHost abstract method
Add a host to the VirtualHost instance.
The host can be either a specific domain (my.domain.name) or a
wildcard-based domain name (*.domain.name). The former will only match
the specific domain name while the latter will match any series of
sub-domains.
If both my.domain.name and *.domain.name is specified, the most
qualified will take precedence, my.domain.name in this case.
Implementation
Stream<HttpRequest> addHost(String host);