xbps-bin: print different msgs for pkgs marked as preserve and essential.
xbps-bin: print different msgs for pkgs marked as preserve and essential.

--HG--
extra : convert_revision : xtraeme%40gmail.com-20100125151648-s3d0zxaro5v5bh95

datenwolf/xbps,ebfe/xbps,datenwolf/xbps,ebfe/xbps,datenwolf/xbps,stpx/xbps,stpx/xbps,ebfe/xbps,stpx/xbps