path: fixed the name of the parameter in enable_r2 example

src/modules/path/doc/path_admin.xml

@@ -192,10 +192,10 @@ modparam("path", "received_format", 1)
 		</emphasis>
 		</para>
 		<example>
-		<title>Set <varname>use_received</varname> parameter</title>
+		<title>Set <varname>enable_r2</varname> parameter</title>
 		<programlisting format="linespecific">
 ...
-modparam("path", "use_received", 1)
+modparam("path", "enable_r2", 1)
 ...
 </programlisting>
 		</example>