After upgrading from fedora 29 to fedora 30, I get
Fedora 30 uses readline 8.0. The easiest ways to deal with it would be to
rebuild your local nmh (I recommend build_nmh in the top-level nmh source
directory) or install the Fedora RPM (sudo dnf install nmh).
I assume I should back up > /usr/local/nmh/etc
and then use make to remove the current install. How/which target?
There is an uninstall target, but I've never used it. I just remove the entire
nmh tree (/usr/local/nmh/ in your case).