The title “War for the Planet of the Apes” is a misnomer.In this third installation of the prequel trilogy chronicling the events leading up to 1968’s “Planet of the Apes,” there is no planet of apes — it’s more like a tribe. But make no mistake: The humans have declared war.The film begins with the family of Caesar, a human-raised and educated chimpanzee, seemingly safe in a California forest. Then human soldiers invade, intent on exterminating the apes.As far as we can tell, the …