doc: edns_keepalive polish

modules/edns_keepalive/README.rst

@@ -3,10 +3,18 @@
 EDNS keepalive
 ==============
 
-The ``edns_keepalive`` module implements :rfc:`7828` for *clients* connecting to Knot Resolver via TCP and TLS.
-Note that client connections are timed-out the same way *regardless* of them sending the EDNS option;
-the module just allows clients to discover the timeout.
+The ``edns_keepalive`` module implements :rfc:`7828` for *clients*
+connecting to Knot Resolver via TCP and TLS.
+The module just allows clients to discover the connection timeout,
+client connections are always timed-out the same way *regardless*
+of clients sending the EDNS option.
 
 When connecting to servers, Knot Resolver does not send this EDNS option.
 It still attempts to reuse established connections intelligently.
 
+This module is loaded by default. For debugging purposes it can be
+unloaded using standard means:
+
+.. code-block:: lua
+
+        modules.load('edns_keepalive')