Process for retiring a subpackage

[Adam Dinwoodie <adam at dinwoodie dot org>]

Per previous discussion on this list, I'm planning on retiring the
separate packaging of Bash completion scripts in the packages I
maintain, and folding the files into the main package.  I can't find any
documentation that'll hold my hand through that process, so can somebody
with the relevant arcane knowledege check my understanding of what's
necessary?

Taking git-completion as an example, where I'm moving all the contents
from that package into the main git package:

- For the first release that obsoletes git-completion:

  - Create the main git package in such a way that it contains the files
    that would previously have been in git-completion.

  - Create a dummy git-completion package that:

    - Has a dependency on the git package (which it normally does
      anyway).
    - Has a category of "_obsolete".
    - Has no actual content.

  - Create the rest of the release as normal.

- For following releases:

  - Continue to create all the packages as normal (excluding
    git-completion).

  - Don't bother to create new versions of the git-completion package.

The above process is cobbled together from memory of emails going past
this list, so I'd appreciate someone checking I've understood correctly.