Socket library from hslibs

For simple networking, I usually find that the simple Socket interface from hslibs does everything I need, except that I always need to import sClose from SocketPrim as well, so I can close the sockets I open. Tidying up some old code this morning, I was wondering: is the absence of sClose in the Socket interface accidental, or should I be disposing of listening sockets some other way? Cheers, Chris.