[submittodebian] Add option to send the last N changelog entries

[Olivier Gayot]

submittodebian generates the debdiff to submit based on the last added changelog entry.

Sometimes, we are doing successive uploads to Ubuntu, as in the following example:

khmer (3.0.0~a3+dfsg-5ubuntu3) noble; urgency=medium

  * Ensure that the scripts properly close files that they open for writing.
    Python 3.12 seems to be less forgiving and oftentimes, files end up
    truncated.
  * Ensure importlib is used instead of imp, which was dropped from Python
    3.12.

 -- Olivier Gayot <email address hidden> Sun, 26 Nov 2023 02:28:32 +0100

khmer (3.0.0~a3+dfsg-5ubuntu2) noble; urgency=medium

  * Fix obsolete function call in previous patch.

 -- Simon Quigley <email address hidden> Sat, 25 Nov 2023 11:11:03 -0600

khmer (3.0.0~a3+dfsg-5ubuntu1) noble; urgency=medium

  * Fix build against Python 3.12 (LP: #2044383).

 -- Olivier Gayot <email address hidden> Thu, 23 Nov 2023 15:24:51 +0100

It would be great to have the option in submittodebian to include the changes of the last N uploads (here the last 3) and send them to Debian as one bigger debdiff.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.