Tails based on Jessie

Related issues

• Related to #5821 (closed)
• Blocked by #7423 (closed)
• Blocks #8231 (closed)
• Blocks #8230 (closed)
• Blocks #10338
• Blocks #10279 (closed)
• Blocks #8659 (closed)

Original created by @intrigeri on 6171 (Redmine)