Pass opts to #var through to #ask_for_var and then through to the prompter, so that 'y' is valid for confirmations done via vars.
Pass opts to #var through to #ask_for_var and then through to the prompter, so that 'y' is valid for confirmations done via vars.

Closes gh-36

victorklos/babushka,victorklos/babushka,victorklos/babushka