Merge pull request quay#823 from imlonghao/release-2.0-bullseye

Backport: Add Debian Bullseye (11)

cut v2.0.8

This release includes the following:

* Switched to a static TLS Cipher Suite that does not use 3DES,
  protecting clients from suffering from Sweet32
* Fixed debugging log lines that were being printed always
* Added exponential backoff for updater failures (thanks @reasonerjt)

cut v2.0.7

This release includes a fix for mapping Ubuntu Cosmic to the proper
namespace.

cut v2.0.6

This release includes two fixes:
- NVD has moved onto AWS. We've updated to use that more scalable
database.
- HTTP requests now have a useragent to allow internal and external
networks to segment traffic. Thanks to Jean Michel MacKay (@MackJM)

cut release v2.0.5

This release points Clair to Alpine Security DB to a GitHub repository
because their servers were unable to handle the traffic from Clair
users.

Thanks to Daniel Jiang (@reasonerjt)

Merge pull request quay#530 from meringu/patch-1

Proxy for 2.0

database: add ubuntu bionic namespace mapping

cut v2.0.1

cut v2.0.0