To prepare for future changes, warn users if their config file currently
does not explicitly specify a default seeding policy.
Because there are now potentially multiple warnings generated that all
relate to the configuration file, group these together and adjust the
wording to be more uniform.
The `help` module is no longer needed, since `clap` handles that.
This meant that the re-exports of each command's `ABOUT` could be removed and
the `const`s can now be private.
When we fail to get the info for the binary names of `radicle-node` and
`git-remote-rad`, we still mention the binary name which is usually a part of
their output.
A `HashMap` does not guarantee a consistent iteration order. It is
desirable that all environment variables are printed in a consistent
order.
Use a `BTreeMap` which guarantees a consistent iteration order.