Core work 2018Q1 → 2018Q2: Debian

Originally created by @Anonymous on #14646 (Redmine)

Parent Task: tails/accounting#13246

Related issues

• Blocked by #14650 (closed)
• Blocked by #14652 (closed)
• Blocked by #14981 (closed)
• Blocked by #15179 (closed)
• Blocked by #15183 (closed)
• Blocked by #15533 (closed)
• Blocked by #15594 (closed)
• Blocked by #15595 (closed)
• Blocked by #15596 (closed)