atrf-path.c (usage): list common args only once, not in each synopsis
atrf-path.c (usage): list common args only once, not in each synopsis

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan