Bug#942104: release.debian.org: Will fail if "Suite" field is missing

[Ansgar <ansgar@43-1.org>]

> britney assumes that if you have a Release file, it will contain a "Suite"
> field. That's not true, the "Codename" entry is required but the "Suite"
> one is optional.

https://wiki.debian.org/DebianRepository/Format#A.22Release.22_files
says one of Suite and Codename is required.  Codename itself is not required.

I wouldn't be surprised if many tools just use one and assume it always
exists and would recommend to always provide both.

Ansgar