xbps_find_pkg_orphans: remove workaround for target pkgs; ignore unknown pkgs.
xbps_find_pkg_orphans: remove workaround for target pkgs; ignore unknown pkgs.

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