The four city officials who are assigned a security detail no longer have to pay the expenses on their taxpayer-funded official cars and drivers when they use them for personal excursions, according to a ruling by the Conflicts of Interest Board. The lucky protected ones are Mayor Bloomberg, Comptroller William Thompson, Public Advocate Betsy Gotbaum and City Council Speaker Christine Quinn. In 2006, former state Comptroller Alan Hevesi resigned after admitting he assigned a government......