- Fix RM_PKGS not working with -n, as it checked for M_PKS. Typo.
- Use egrep where it makes sense, so wanting to remove slackpkg+ does
not result in removing both, slackpkg and slackpkg+.
- Rename -e to -t.
- Add a new option: -T. Install or just download packages from a template
generated with -t. Only works with packages from the Slackware series,
however, there is an undocumented -e option that can be used to use the
generic package look-up, so that it will also get third party packages.
This is slow, though.