Added documentation for port->socket.

doc/scsh-manual/network.tex

@@ -124,6 +124,16 @@ is preferred to explicitly closing the inport and outport because using
 
 \end{desc}
 
+\defun  {port->socket} {port protocol-family} {socket}
+\begin{desc}
+  This procedure turns \var{port} into a socket object. The port's
+  underlying file descriptor must be a socket with protocol family
+  \var{protocol-family}. \ex{port->socket} comes in handy for writing
+  servers which run as children of \texttt{inetd}: after receiving a
+  connection \texttt{inetd} creates a socket and passes it as
+  standard input to its child.
+\end{desc}
+
 \section{Socket addresses}
 
 The format of a socket-address depends on the address family of the