This will take a while once it starts; I'll send another email to the list to notify when the process starts and ends.
Quick addendum: do **not** migrate open bugs manually from Bugzilla to GitLab.
If a bug is still open, it will be automatically migrated, with all comments and attachments, to GitLab, and the old issue in Bugzilla will be closed with a link to the new location.
If a bug has been closed already as part of the Bugzilla clean up, you can open a new issue in GitLab manually, linking to the old issue in Bugzilla.
