type args struct {
Hosts []string `arg:"positional" help:"host:port list to check"`
Timeout int `arg:"-t" default:"10" help:"connection timeout seconds"`
WarnAtDays int `arg:"-w" placeholder:"WARNAT" default:"30" help:"warn if expiry before days"`
YAML bool `arg:"-y" help:"display output as YAML"`
JSON bool `arg:"-j" help:"display output as JSON (default)"`
}