Document s.connect_ex(), which does not raise an exception on error.
diff --git a/Doc/lib/libsocket.tex b/Doc/lib/libsocket.tex
index ea6cae3..bbcc7f1 100644
--- a/Doc/lib/libsocket.tex
+++ b/Doc/lib/libsocket.tex
@@ -201,6 +201,13 @@
(The format of \var{address} depends on the address family --- see above.)
\end{funcdesc}
+\begin{funcdesc}{connect_ex}{address}
+Likecode{connect(\var{address})}, but return an error indicator
+instead of raising an exception. The error indicator is 0 if the
+operation succeeded, otherwise the value of the \code{errno}
+variable. This is useful e.g. for asynchronous connects.
+\end{funcdesc}
+
\begin{funcdesc}{fileno}{}
Return the socket's file descriptor (a small integer). This is useful
with \code{select}.