Do not print loaded config to a log file

[contentsquare]

Do not print loaded config to a log file

[hagen1778]

Yeah, secrets should hidden. I imagine it like following:

// Auth is a structure for holding creds
type Auth struct {
	// CH user name
	User string `yaml:"user"`

	// CH user password
	Password string `yaml:"password"`

	// Catches all undefined fields
	XXX map[string]interface{} `yaml:",inline"`
}

func (a Auth) String() string {
	return fmt.Sprintf("user: %q\npassword: <secret>", a.User)
}

func (a Auth) MarshalYAML() (interface{}, error) {
	return a.String(), nil
}

Would be great to have this implemented