Severity: 883872 minor stop Please quote the part of https://www.debian.org/doc/debian-policy/#copyright-information that says "every single file must be mentioned in the copyright file". I don't see it there nor would I see the point as per-file info is best off stored in those very files.
Let me know if there's something actually serious like a *licence* not being accounted for, or a (significant) author or group of authors (that is not the currently mentioned me/dx/BitlBee team or Gaim team) not mentioned.