add -c => -cdrom cloud-init.iso support to run_archiso.sh
make run_archiso forward VM's port 22 to host 60022, for easy SSH testing
add cloud-init files to .gitignore (and loosen out/ and work/)
add VNC support to run_archiso.sh
add cloud-init to baseline
make baseline have working ethernet networking, like releng
use same airootfs_image_tool_options in baseline as in releng
add SSH server to baseline