- Switched to new way of building Enterprise
- Removed `tctl tunnels` command (preparation for new resources)
- Removed `tctl auth ls` command (preparation for new resources)
Instead of trying to achieve a full "offline" operation, this commit
honestly converts previous attempts to a "caching access point client"
behavior.
Closes#554
What works:
1. You have to start all 3: node, proxy and auth.
2. Login using 'tsh' (so it will create a cert)
3. Then you can shut 'auth' down.
4. Proxy and node will stay up and tsh will be able to login.
What doesn't work:
1. Auth updates are not visible to proxy/node (like new servers)
2. Not sure if "trusted clusters" will work.