registrar: list of allowed route blocks updated for save()

modules/registrar/README

@@ -760,7 +760,8 @@ modparam("registrar", "flow_timer", 25)
        3 - contacts deleted.
        4 - contacts returned.
 
-   This function can be used from REQUEST_ROUTE and REPLY_ROUTE.
+   This function can be used from REQUEST_ROUTE, FAILURE_ROUTE and
+   REPLY_ROUTE.
 
    Example 1.26. save usage
 ...

modules/registrar/doc/registrar_admin.xml

@@ -911,7 +911,7 @@ modparam("registrar", "flow_timer", 25)
 		</listitem>
 		</itemizedlist>
 		<para>
-		This function can be used from REQUEST_ROUTE and REPLY_ROUTE.
+		This function can be used from REQUEST_ROUTE, FAILURE_ROUTE and REPLY_ROUTE.
 		</para>
 		<example>
 		<title><function>save</function> usage</title>