New Lawsuit Challenges Anti-Piracy Technology By LAURENCE FROST    PARIS (AP) -- Copy protection technologies used to prevent CDs from being pirated online are facing a legal challenge in France, where a judge began a formal investigation of record label EMI Group PLC for using them.    Confirming a report in French financial daily Les Echos, the record store Fnac said Wednesday it has also been placed under investigation by a French judge along with EMI's French arm...