PR 464/doc
* clock.t, signal.t: Add documentation for usleep() and ualarm(). Also
fixed a couple of calls which have the wrong .h files per the
OpenGroup site documentation.
* SUPPORT, LICENSE: New files.
* Numerous files touched as part of merging the 4.5 branch
onto the mainline development trunk and ensuring that the
script that cuts snapshots and releases works on the documentation.