A LESSER-KNOWN version of the Rolling Stones’ “Loving Cup,” found on the bonus disc of the new reissue of the band’s 1972 album, “Exile on Main St.,” seems to me the best thing the Stones ever did... ...the recordings ...stretched from 1969 to 1972, across the making of two other excellent and, to me, superior records — “Let It Bleed” and “Sticky Fingers.” ...Mr. Richards contributed little to the extra tracks on the bonus disc and distrusted altering even the outtakes and unused tracks... “I didn’t want to interfere with the Bible.” “My job was to enforce the no-fiddling rule,”...