Clarification of at_thread_exit with respect to interruption

[Charles Brockman <cmbrockman@…>]

A. The documentation for at_thread_exit() and in the Interruption section of Thread Management should be amended. If a thread is interrupted and the exception is not caught, the thread will terminate. In that case is the function specified in at_thread_exit(), if any, called?

B. It would be beneficial to add an example of the use of at_thread_exit() in one of the programs in the \libs\thread\example subdirectory.

C. In the Effects section of the documentation for at_thread_exit(), the sentence
A copy of func is taken and stored to in thread-specific storage.
should probably be
A copy of func is taken and stored in thread-specific storage.
or simply
A copy of func is placed in thread-specific storage.

[Anthony Williams]

Documentation updated on trunk.