Bug#768423: release.debian.org: use projectb more in debrelease.proposed

["Adam D. Barratt" <adam@adam-barratt.org.uk>]

Control: retitle -1 release.debian.org: use projectb more in 
debrelease.*

On 2014-11-07 10:44, Adam D. Barratt wrote:
> The information that we read from .changes and .deb files is also
> available in projectb. It would probably be more efficient to just
> pull it from there rather than doing bucketloads[tm] of I/O.

Thinking about it, there's more than strictly debrelease.proposed.

Things we currently use files for:

- determining which .changes files are in p-u-NEW
- reading Closes: from .changes (we already use the projectb record to 
display Closes: for accepted packages)
- reading binary package lists from .changes
- extracting binary version information from .deb files
- extracting package stanzas from .deb files to feed to dose (in 
debrelease.debcheck)