* Top-level default leafs assigned.

* Enforcing RFC 7950 Sec 7.6.1 means unassigned top-level leafs (or leafs under non-presence containers) are assigned default values.
* NACM default behaviour is read-only (empty configs are dead-lockedd)
  * This applies if NACM is loaded and `CLICON_NACM_MODE` is `internal`
* Fixed: [default values don't show up in datastores #111](https://github.com/clicon/clixon/issues/111)

lib/src/clixon_xml_sort.c

@@ -1029,6 +1029,7 @@ xml_insert2(cxobj           *xp,
  * @retval    0       OK
  * @retval   -1       Error
  * @see xml_addsub where xc is appended. xml_insert is xml_addsub();xml_sort()
+ * @note It is assumed that all siblings of xi are YANG bound
  */
 int
 xml_insert(cxobj           *xp,