Thread Requeue on Priority Change Modifications Merged

[Joel Sherrill]

Hi,

I have just merged code onto the CVS head which
changes one facet of the behavior of thread priority
changes. The scenario in question is:

+ A thread is blocked on a priority based thread queue.
+ The blocked thread's priority is changed.

Prior to this modification, the thread's location on the
priority based thread queue was not reevaluated.
With this modification (see pr1222), the thread
is moved on the thread queue to a position which
reflects its new priority.

Thanks to Saab Space for sponsoring this work.

--joel