1. Move the rc files to /etc/anvil as well
2. Add in usage of python keyring package
and use it to store/fetch passwords instead
of our own yaml password storage. This also
allows for us to use a encrypted password
storage (not turned on by default) if desired
which is a nice to have.
3. Passwords are now stored in 'passwords.cfg'
under /etc/anvil (which should be fine for
now and can be relocated via a cli option
if desired)
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