I would like to request auto-connection for the zerotier-one snap. ZeroTier is an interesting open source project that offers advanced virtual network functionality. Like other VPN implementations, it creates virtual Ethernet interfaces and routing table entries, so it needs permissions from the network-control interface in order to operate. The project is quite stable and unlikely to make harmful networking changes in my experience using it. I think the user experience would be greatly enhanced if the network-control interface were auto-connected.
The upstream source code is here: https://github.com/zerotier/ZeroTierOne/
My own changes (trivial file path change) to make the snap are here: https://github.com/zerotier/ZeroTierOne/compare/master...lhartung:master
I am not affiliated with the ZeroTier project, but they know I exist. 
Requested interface: network-control
Thanks for your consideration!