v0.34.1 release notes

Bump VERSION_BUILD to 0.34.1, update ISO_VERSION default to major.minor.0

Make non-zero ssh error codes less dramatic

Only call trySSHPowerOff if we are using hyperv

Improve reporting when docker host/service is down

Use the new ISO version, for features and security

Don't just wait for a timeout, when SSH is not running.

Also improve the message, don't need to comment stderr.

Make images subdirectory, add start image

Added and unified driver usage instructions.

update releases.json to include v0.34.0

v0.34.0 Release Notes

Update Makefile to v0.34.0