LGPL2.1 is compatible with GPL version 3 and later.
So if a library is released under LGPL 2.1, it can be used
in inetutils.
But isn't there a difference between something licensed under
LGPLv2.1-only and LGPLv2.1-or-later?
There is some difference, but it isn't a crucial difference.
We don't want dependencies on
packages licensed under anything-only in GNU, do we?
That's not an issue for abstract blanket principles, that's
an issue for license compatibility. The issue does not arise
with LGPL2.1.
