Make reference to the socket module a hyperlink.

Doc/lib/internet.tex

@@ -7,7 +7,7 @@
 The modules described in this chapter implement Internet protocols and 
 support for related technology.  They are all implemented in Python.
 Some of these modules require the presence of the system-dependent
-module \module{socket}\refbimodindex{socket}, which is currently only
+module \refmodule{socket}\refbimodindex{socket}, which is currently only
 fully supported on \UNIX{} and Windows NT.  Here is an overview:
 
 \localmoduletable