Sorry if already posted... OCTOBER 13--Janet Jackson’s performance contract stipulates that, if she’s appearing on a bill with a comedian, the comic will be barred from making any reference to the singer or members of “the Jackson family.” The outlawing of jokes about the Jacksons (read: Michael’s relationship with boys; propofol; rhinoplasty; Janet’s weight; wardrobe malfunctions; Blanket; and Jermajesty) is one of several “special provisions” in the chart-topping singer’s performance con