String originalHostnamePattern() {
        return originalHostnamePattern;
    }
Returns the {@code originalHostnamePattern} that does not include the {@link #port()} in the pattern.
For example, if a port number is 8080 and a hostname is {@code foo.com},
the {@link #hostnamePattern()} will be {@code "foo.com:8080"} and
the {@link #originalHostnamePattern()} will be {@code "foo.com"}.
core/src/main/java/com/linecorp/armeria/server/VirtualHost.java