VBOX: Update CPU VMX/SVM usage detection code with the latest error messages returned by VirtualBox 5.x

If an NVIDIA GPU is detected only by OpenCL we don't know how many
cores per proc it has.
Instead of assuming 8 (compute capability 1) assume 48 (CC 2).
We could assume 192 (CC 3) but better to err on the low side.

sched_util.h includes sched_util_basic.h and both are needed to build project specific daemons

(for linking to issue-tracker items and Wiki pages)

New browsers pass "auto" as the first accepted language.
This broke the language selection logic.

BTW, the language selection logic is a kludge and I don't think it works
correctly for e.g. "es en da"

VBOX: Fix a crashing bug on Windows.  If we fail to acquire a machine state lock, just report a VM start failure instead of crashing.

MGR: In Event Log, work around a wxWidgets 3.0 bug in wxGenericListCtrl (Linux only) which causes headers to be misaligned after horizontal scrolling.

Add missing locales and fix localization strings

Fix warning about unsigned int