Log Message:
Update security/py-certbot (and security/py-acme) to 0.8.1.

No changelog provided, Github issues touched:

- Update the autos in response to 0.8.1 release
- Fix default detection
- Provide nonroot guidance when logging gets EACCES.
- Add additional warning with actual exception message during
  renewal
- Interactive webroot values not stored in renewal config file
- Preserve common name during renewal
- Mageia Bootstrap
- Initialize Augeas in a different method to be able to react to
  ImportError
- Renew changes common name
- Update letsencrypt-auto in response to Arch package rename
- On Mac OSX: "ValueError: Invalid header value"
- Strip "\n" from end of OS version string for OS X.
- Revert "Use --force-reinstall to fix bad virtualenv package"
- Exit if cannot bootstrap in certbot-auto
- Add --disable-hook-validation
- --post-hook validation too strict
- letsencrypt-auto gives "sudo" is not available
- mageia bootstrap [needs revision]
- Install/compile fails of letsencrypt-auto on Smartos/Illumos