func (e *EnvVar) SetStr(keyVal string) {
	s := strings.SplitN(keyVal, "=", 2)
	if len(s) == 2 {
		e.Set(s[0], s[1])
	}
}
func (e *EnvVar) SetStr(keyVal string) {
	s := strings.SplitN(keyVal, "=", 2)
	if len(s) == 2 {
		e.Set(s[0], s[1])
	}
}
// SetStr sets environment variable from key=val string format.