Verify that released RPMs are installable

[hrs]

We're using goreleaser to generate the RPMs. It's no raising any errors, so I'm guessing they can be installed, but I don't have a Fedora machine (or VM) handy at the moment to be sure.

Similarly, like we did with deb packages, we ought to ensure that our RPMs don't raise any errors or warnings with rpmlint.

There's a directory of the meanings of common rpmlint errors that might be handy.

[hrs]

I've just verified with a Fedora VM that the RPM installs the binary and the man page correctly.

Still ought to fix linting errors, though.