Note on backrefs

diff --git a/src/lib/unlang/xlat_builtin.c b/src/lib/unlang/xlat_builtin.c
index 5cd84f6cd052406ee7f62c02c66f84a3b524cfc3..0f86b305381d83319986cef2e5b911dff5686be4 100644 (file)
--- a/src/lib/unlang/xlat_builtin.c
+++ b/src/lib/unlang/xlat_builtin.c
@@ -3138,6 +3138,8 @@ static int xlat_instantiate_subst_regex(xlat_inst_ctx_t const *xctx)
 @verbatim
 %subst(%{User-Name}, /oo.*$/, 'un') == "fun"
 @endverbatim
+ *
+ * @note References can be specified in the replacement string with $<ref>
  *
  * @see #xlat_func_subst
  *