Use the correct package names on Debian

[ekohl]

This also allows using jessie-backports. Replaces #76.

[ekohl]

I also used the following apt config to pull the right packages in. Not sure it belongs in this module, maybe just in the README?

include ::apt
include ::apt::backports
apt::pin { 'jessie-backports-letsencrypt':
  release  => 'jessie-backports',
  packages => prefix(['acme', 'cryptography', 'openssl', 'psutil', 'setuptools', 'pyasn1', 'pkg-resources'], 'python-'),
  priority => 700,
}

[oranenj]

@ekohl: Can you add that to the README? (with syntax fixed, please :))

What's the 'prefix-' for though?

[ekohl]

The prefix() comes from stdlib. The actual package names are python-acme, python-cryptography but this resulted in a shorted line so puppet-lint is happy. I can go with the explicit version if that would be preferred.

[oranenj]

@ekohl: In your code snippet you were adding a 'prefix-' prefix to the packages instead of 'python-' though :)

Using prefix() in the example is fine.

[ekohl]

@oranenj you're totally right. I guess late night hacking results in bad code sometimes :)