support FLAGS_max_matches == 0 to mean unlimited
support FLAGS_max_matches == 0 to mean unlimited

paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,paulproteus/livegrep,wfxiang08/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,lekkas/livegrep,paulproteus/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep