Main/USB: Fix darwin assertion on Macbooks with USB 3.0 (Superspeed) ports and devices, introduce new device speed enum value for USB 3.0 devices
Mac OS X host: improve support for host optical drives; add support for CD and BlueRay drives.
Mac OS X host: Host USB: improve checking if storage device is currently mounted.
Mac OS X host: USB Device filters: fix filter matching.
format string fixes
Main: RT_ZERO() / RTStrCopy()
header (C) fixes
bugref..
*,IPRT: Redid the ring-3 init to always convert the arguments to UTF-8.
Main: source re-org.