* model changes
* additional fields for extclient create
* add DNS to extclient config
* extclient name checks
* update extclient
* nmctl extclient
* final tweaks
* review comments
* add extclientdns to node on ingress creation
* fix to add ingress dns to api (#2296)
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Co-authored-by: Aceix <aceixsmartX@gmail.com>
