Moved the mutex docs to be adjacent to the sched docs, since these are
meant to be used together (if they are used at all!).
\input{libpython} % Python Runtime Services
\input{libsys}
\input{libgc}
+\input{libfpectl}
\input{libatexit}
\input{libtypes}
\input{libuserdict}
%\input{libcmpcache}
\input{libtime}
\input{libsched}
+\input{libmutex}
\input{libgetpass}
\input{libcurses}
\input{libascii} % curses.ascii
\input{libselect}
\input{libthread}
\input{libthreading}
-\input{libmutex}
\input{libqueue}
\input{libmmap}
\input{libanydbm}