The pkg command
pkg query '%V' returns a flag (0 or 1) that specify if a package is marked 'vital' or not. I checked for all packages I have installed but this flag is unset for all of them. I guess this flag can be set by the user for own information, but is there some hidden purposes by the pkg program itself? It can be a duplication of 'automatic' flag (a complement, i.e. a non automatic package is a vital package, a package you need and explicitly installed)?