One project we should also work on is the deprecation and removal of -l list suffixes. This is a task specific to Wikidata-l for the maintenance window on Tuesday, May 19th.
Wikidata-l has been put forward as a trial list to be renamed to Wikidata. Currently a list exists at Wikidata however it can be disabled (but not deleted) per Lydia.
I will file the changes for apache and exim changes.
If this goes well, we can consider thinking about doing this as a project for all lists (with notice).