feh(1): --start-at: add hint about absolute/relative path limitations
feh(1): --start-at: add hint about absolute/relative path limitations

BlackLight/feh,yusiwen/feh,Caellian/feh,yusiwen/feh,Caellian/feh,BlackLight/feh,BlackLight/feh,Caellian/feh,yusiwen/feh,Caellian/feh