PHILADELPHIA — During the month of protests against police brutality in Philadelphia, more than 750 people were arrested for curfew violations, failure disperse and disorderly conduct. Many were handcuffed, taken to remote police districts and kept in hot cars or buses for hours — some so long they urinated on themselves or began pleading for water. Then, they were released not with criminal charges but civil citations, the type of ticket given for high weeds or litter.Less than a week after a Philadelphia Inquirer report on allegations the practice was a violation of free speech, Mayor Jim Ke…