Could the return of a cult-favorite at McDonald’s provide a bump to shaving sector sales? Beginning tomorrow, the fast food goliath will give away McRib sandwiches to select fans who show their clean-shaven face. The first 10,000 entries will receive a code for a free sandwich, said McDonald’s, which is also offering the opportunity tothose without beards; anyone can participate by posting a picture of their cleanly-shaven or baby-smooth face post facial care mask, too. Entrants need to use #...