Configurable devices

After giving configurable devices some thought, I think "configurable" is not a good way to describe them. They're in fact prebooked, preconfigured devices that we connect over SSH by using network parameters specified by the device flags. By design, we'll never try to do any configuration to them, because we don't care what kind on devices they are, as long as we can talk to them via SSH. So I think we should rename configurable to ssh.

In case ssh is too simplistic, here are a few other options:

• ssh-server
• ssh-enabled
• ssh-capable

The following labels would need changing:

• //labgrid/constraint/device:configurable
• //labgrid/toolchain/config/configurable:configurable