adds transport policy interface documentation

websocketpp/transport/base/endpoint.hpp

@@ -45,6 +45,23 @@ typedef lib::function<void(connection_hdl,const lib::error_code&)> connect_handl
 
 typedef lib::function<void()> endpoint_lock;
 
+// Endpoint interface
+// Methods a transport endpoint must impliment
+
+/// Initialize a connection
+/**
+ * Signature: lib::error_code init(transport_con_ptr tcon);
+ * 
+ * init is called by an endpoint once for each newly created connection. 
+ * It's purpose is to give the transport policy the chance to perform any 
+ * transport specific initialization that couldn't be done via the default 
+ * constructor.
+ *
+ * @param tcon A pointer to the transport portion of the connection.
+ *
+ * @return A status code indicating the success or failure of the operation
+ */
+
 } // namespace transport
 } // namespace websocketpp