upgrades.html#upgrade-the-server-after-v0-16-1

Just one big item: beta version of nmctl - a CLI tool for Netmaker servers!! Check it out in the release assets below! (Only available for linux-amd64 for now)

A lot of code cleanup
QoL enhancements around different pointers in the code base
peers are sent more uniformly every update, which should help with netclient caching
validation for ext-client and node names
CORS allowed origin issue with default reverse proxy
A longer netclient daemon startup, which should help netclient not start before DNS services are online in some cases
an admin can no longer make another admin, a non-admin (but they can delete them still)
netclients now collect local interfaces and you can select which one to use for your local address via the Admin Dashboard/UI
removed two unused api endpoints

unable to ping ext clients from windows
if node is disconnected via cli and then reconnected via netmaker UI -- peers may take some time to be populated
IPv6 node public endpoints are not supported
some users have experienced interrupted connections/packet loss, we are monitoring the situation, but can not replicate currently

bug where admin users would change their password in ee and it would make them a non-admin, as a result admins can no longer make other admins non-admins (have to delete them instead)

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