Issue #7733: add explicit reference in asyncore docs.

Author: djc

Doc/library/asyncore.rst

@@ -202,7 +202,8 @@ any that have been added to the map during asynchronous service) is closed.
    .. method:: bind(address)
 
       Bind the socket to *address*.  The socket must not already be bound.  (The
-      format of *address* depends on the address family --- see above.)  To mark
+      format of *address* depends on the address family --- refer to the
+      :mod:`socket` documentation for more information.)  To mark
       the socket as re-usable (setting the :const:`SO_REUSEADDR` option), call
       the :class:`dispatcher` object's :meth:`set_reuse_addr` method.