adapt to min value of 1 for listen() backlog argument
diff --git a/Doc/lib/libsocket.tex b/Doc/lib/libsocket.tex
index dfd08c7..375d38e 100644
--- a/Doc/lib/libsocket.tex
+++ b/Doc/lib/libsocket.tex
@@ -157,8 +157,8 @@
\begin{funcdesc}{listen}{backlog}
Listen for connections made to the socket.
-The argument (in the range 0-5) specifies the maximum number of
-queued connections.
+The argument specifies the maximum number of queued connections and
+should be at least 1; the maximum value is system-dependent.
\end{funcdesc}
\begin{funcdesc}{makefile}{mode}
@@ -234,7 +234,7 @@
PORT = 50007 # Arbitrary non-privileged server
s = socket(AF_INET, SOCK_STREAM)
s.bind(HOST, PORT)
-s.listen(0)
+s.listen(1)
conn, addr = s.accept()
print 'Connected by', addr
while 1: