What is meant by, "mild drinks" in D&C section 89?

> 17 Nevertheless, wheat for man, and corn for the ox, and oats for the horse, and rye for the fowls and for swine, and for all beasts of the field, and **barley** for all useful animals, and **for mild drinks**, as also other grain. (Doctrine and Covenants, Section 89:17) What mild barley drinks is this verse referring to? Does this mean Mormons are encouraged to drink non-alcoholic beer? What were they drinking in Joseph Smith's time that is considered good for man according to the word of wisdom?