config/env/env.go
func _Set(filename, key, value string) error {
	// Check if the key is already used.
	conf, err := shconf.ParseFile(filename)
	if err != nil {
		if err != os.ErrNotExist {
			return err
		}
		println("ErrNotExist") //TODO: remove
	} else {
		if _, err = conf.Get(key); err != shconf.ErrKey {
			panic("OPS")
		}
	}

	return file.AppendString(filename, key+string(conf.Separator())+value)
}
func _Set(filename, key, value string) error {
	// Check if the key is already used.
	conf, err := shconf.ParseFile(filename)
	if err != nil {
		if err != os.ErrNotExist {
			return err
		}
		println("ErrNotExist") //TODO: remove
	} else {
		if _, err = conf.Get(key); err != shconf.ErrKey {
			panic("OPS")
		}
	}

	return file.AppendString(filename, key+string(conf.Separator())+value)
}
// == Set variables
//
// _Set sets the value named by the key in the given filename.