presto-main/src/main/java/io/prestosql/server/security/KerberosConfig.java/KerberosConfig/setServiceName
class KerberosConfig:    @Config("http-server.authentication.krb5.service-name")
    @LegacyConfig("http.server.authentication.krb5.service-name")
    public KerberosConfig setServiceName(String serviceName)
    {
        this.serviceName = serviceName;
        return this;
    }