zweed4u

// iOS 11 moves OFVariables to const
// https://twitter.com/s1guza/status/908790514178301952
// however, if we:
//  1) Can find IODTNVRAM service
//  2) Have tfp0 / kernel read|write|alloc
//  3) Can leak kernel address of mach port
// then we can fake vtable on IODTNVRAM object
// async_wake satisfies those requirements
// however, I wasn't able to actually set or get ANY nvram variable
// not even userread/userwrite