* Support Vetu virtualization on Linux in addition to Tart on macOS
* api(portForward): ensure that rendezvousConn is closed
* Re-try SSH connections in integration tests
Because a VM might be still booting.
* proxy.Connections(): require io.ReadWriteCloser instead of net.Conn
* Orchard Controller: implement an SSH server that acts as a jump host
* Issue a warning if the name used will be invalid in the future
* Further restrict uppercase characters in names in the future
The rationale is similar to https://github.com/kubernetes/kubernetes/issues/71140.
We won't want to munge the user's input and introduce subtle bugs doing
lowercase comparisons.
Nikolay Edigaryev