On “The Ed Sullivan Show” in 1967, Joan Rivers joked about society’s double-standard for women. “A girl, you’re 30 years old, you’re not married, you’re an old maid,” she said. “A man, he’s 90 years old, he’s not married, he’s a catch.” At the time, it was rare to see a female comic onstage, and even rarer for an entertainer to talk frankly about being a woman. A few years later, on “The Carol Burnett Show,” Rivers boasted about wearing a pushup bra, laughed about the lack of sex in long marriages and blatantly said men like second wives better. Rivers, who died Thursday at 81, was a trailblazer for all comics, but especially for women. Funeral services will be held Sunday at Temple Emanu-El in Manhattan, the assistant to Rabbi Joshua Davidson confirmed on Friday