A federal judge has ruled that iPhone 4 and 4s users can pursue their class action lawsuit against Apple for intentionally disabling FaceTime on iOS 6 devices, Reuters reports. After losing a patent lawsuit to VirnetX in 2012, Apple was forced to discontinue its direct device-to-device mode for FaceTime, greatly increasing the fees it had to pay to Akamai Technologies — dropping as much as $50 million in one six-month period according to court…