* Follows RFC7950 Sec 15.1 and 15.6 more closely
* Fixed: [When multiple lists have same key name, need more elaborate error message in case of configuration having duplicate keys](https://github.com/clicon/clixon/issues/362)
Added new recursive minmax check for non-presence containers
This makes validation checks stricter, including check of incoming RPCs
Renamed xml_yang_check_list_unique_minmax() to xml_yang_minmax_recurse()
Fixed again: [YANG min-elements within non-presence container does not work](https://github.com/clicon/clixon/issues/355)
