This replaces OpenCore signature checking with .contentVisibility file
containing either `Disabled` or `Auxiliary` to hide entries from the
boot picker.

OpenVariableRuntimeDxe: Transfer AcpiGlobalVariable from real to emulated NVRAM to preserve wake from S3 on EFI 1.1 systems

Fixes https://github.com/acidanthera/bugtracker/issues/2067

- Correctly initialize max click duration and double click speed
- Don't initialize poll times statically
- Bound polling to 32-bit values
- Use unsigned values for pointer position

 - Compatible with earlier macOS (Snow Leopard+ tested)
 - Automatically installs as launch daemon (Yosemite+) or logout hook

MSRs MSR_IA32_EXT_CONFIG and MSR_CORE_FSB_FREQ are not supported on P4 platforms, limiting to Yonah and newer only