in src/main/java/com/spotify/ffwd/http/HttpDiscovery.java [111:121]
public HostAndPort withOptionalSearchDomain(final String searchDomain) {
if (host.equals("localhost") || host.endsWith(".")) {
return this;
}
if (searchDomain == null) {
return this;
}
return new HostAndPort(host + "." + searchDomain, port);
}