Add settrace() and setprofile() functions to the threading library.
diff --git a/Doc/lib/libthreading.tex b/Doc/lib/libthreading.tex
index 2fe72de..ad48feb 100644
--- a/Doc/lib/libthreading.tex
+++ b/Doc/lib/libthreading.tex
@@ -90,6 +90,20 @@
A thread that executes a function after a specified interval has passed.
\end{classdesc*}
+\begin{funcdesc}{settrace}{func}
+Set a trace function \index{trace function} for all threads started
+from the \module{threading} module. The \var{func} will be passed to
+\cfuntion{sys.settrace} for each thread, before its \method{run}
+method is called.
+\end{funcdesc}
+
+\begin{funcdesc}{setprofile}{func}
+Set a profile function \index{profile function} for all threads started
+from the \module{threading} module. The \var{func} will be passed to
+\cfuntion{sys.setprofile} for each thread, before its \method{run}
+method is called.
+\end{funcdesc}
+
Detailed interfaces for the objects are documented below.
The design of this module is loosely based on Java's threading model.