vfs:  Add filehandle ioctl() primitive
vfs:  Call ioctl() primitive
relix:  Call ioctl() primitive
Genie -> vfs:  Move FIONBIO ioctl handler
Genie:  Remove StreamHandle::IOCtl()
Merge branch 'vfs-ioctl'
Genie:  Derive GestaltDeviceHandle from filehandle

The Gestalt device is not a stream and doesn't have to pretend to be.
Genie:  Remove Genie dependency from /dev/gestalt
Genie -> MacVFS:  Move /dev/gestalt implementation