Apple has posted the new firmware for its second-generation Apple TV ahead of the device’s delivery to customers. Based on the file name, AppleTV2,1_4.1_8M89_Restore.ipsw, the firmware appears to be a version of iOS 4.1. Notably, the iPhone Dev-Team was able to use its SHAtter exploit to decrypt the keys used to block access to the Apple TV filesystem; according to Will Strafach, the new Apple TV OS is a “mashup of the old AppleTV OS and…