public Builder keyPassword(String password) {
      this.keyPassword = password;
      return this;
    }
Set the hostname of the http server. The host name is used to resolve the _HOST field in
Kerberos principals. The hostname of the first listener will be used if the name is
unspecified.
hbase-http/src/main/java/org/apache/hadoop/hbase/http/HttpServer.java