The Civilian Complaint Review Board — the city agency that investigates complaints against the New York police — is hoping for a windfall: Surely the protests around the Republican National Convention will bring it a whole new set of clients. Such a fabulous contingency is not something you just leave to chance, however. So the CCRB has sent out about 750 e-mails to anti-RNC groups across the world seeking their business.... The agency also posted information on the Web site of United for Peace and Justice, the umbrella organization for convention protest, on how to file complaints by dialing 311...