Changed content

mq_close(), mq_getattr(), mq_notify(), mq_open(), mq_receive(), mq_send(), mq_setattr(), mq_timedreceive(), mq_timedsend(), mq_unlink()
Added information about the traditional (mqueue) and alternate (mq) implementations of message queues.
nanospin(), nanospin_calibrate(), nanospin_count(), nanospin_ns(), nanospin_ns_to_count()
The nanospin*() functions are designed for use with hardware that requires short time delays between accesses. You should use them to delay only for times less than a few milliseconds. For longer delays, use the POSIX timer_*() functions.
pci_attach_device(), pci_find_class(), pci_find_device()
For a list of supported device and vendor IDs, see <hw/pci_devices.h>; for a list of class and subclass codes, see <hw/pci.h>.