Reworked sound system shutdown - placed single shutdown point in CL_S…

…hutdownRef(), code cleanup

Updated changelog

Updated changelog

Updated build.yml

Updated changelog

Added FAQ and change log to docs

Disabled WASAPI for msvc builds

Vulkan: removed unused qgl.h

vm_armv7l: ported dynamic register allocation and new opstack code fr…

…om vm_aarch64

vm_aarch64: fixed compiler warning

Disabled whiteimage + "filter" texture optimization

win_snd: backported IsWindows7OrGreater() from ETe to avoid using Ver…

…sionHelpers.h, fixes ec-#62