Add confirmation for `vagrant destroy`
Add confirmation for `vagrant destroy`

The standard behavior is to ask confirmation from the user unless
`--force/-f` option is specified.

oddnoc/vagrant-digitalocean,hiroraba/vagrant-digitalocean,adampats/vagrant-digitalocean,wizonesolutions/vagrant-digitalocean,Jdesk/vagrant-digitalocean,Jdesk/vagrant-digitalocean,hiroraba/vagrant-digitalocean,scub/vagrant-linode,visualphoenix/vagrant-digitalocean,wizonesolutions/vagrant-digitalocean,scub/vagrant-linode,displague/vagrant-linode,tmoreira2020/vagrant-digitalocean,duleorlovic/vagrant-digitalocean,adampats/vagrant-digitalocean,timani/vagrant-digitalocean,oddnoc/vagrant-digitalocean,Jurisdesk/vagrant-digitalocean,smdahlen/vagrant-digitalocean,displague/vagrant-linode,akerl/vagrant-linode,blueprintmrk/vagrant-digitalocean,blueprintmrk/vagrant-digitalocean,tmoreira2020/vagrant-digitalocean,devopsgroup-io/vagrant-digitalocean,smdahlen/vagrant-digitalocean,jhoblitt/vagrant-digitalocean,akerl/vagrant-linode,jhoblitt/vagrant-digitalocean,devopsgroup-io/vagrant-digitalocean,timani/vagrant-digitalocean,visualphoenix/vagrant-digitalocean,duleorlovic/vagrant-digitalocean,Jurisdesk/vagrant-digitalocean