Complete the addition of libthreading.tex.  (Isn't it annoying that
you need to edit four files in order to add one section to the manual?)
diff --git a/Doc/lib/lib.tex b/Doc/lib/lib.tex
index 7c74903..0143e6a 100644
--- a/Doc/lib/lib.tex
+++ b/Doc/lib/lib.tex
@@ -126,6 +126,7 @@
 \input{libsocket}
 \input{libselect}
 \input{libthread}
+\input{libthreading}
 \input{libqueue}
 \input{libanydbm}
 \input{libwhichdb}
diff --git a/Doc/lib/libsomeos.tex b/Doc/lib/libsomeos.tex
index 1e282f5..dcafd08 100644
--- a/Doc/lib/libsomeos.tex
+++ b/Doc/lib/libsomeos.tex
@@ -21,6 +21,10 @@
 \item[thread]
 --- Create multiple threads of control within one namespace.
 
+\item[threading]
+--- Higher level threading interface; use in preference of module
+\module{thread}.
+
 \item[Queue]
 --- A stynchronized queue class.