BERLIN -- German police appealed Friday for information about the possible owners of two 17th-century paintings discovered in a highway rest stop dumpster.Police said a 64-year-old man found the oil paintings at the rest stop near Ohrenbach in central Germany last month.He later handed them in to police in the western city of Cologne.An initial assessment by an art expert concluded the two framed paintings were originals, police said.One is a self-portrait by Pietro Belloti showing the Italian