Core work 2017Q3: Sysadmin (Maintain our already existing services)

Originally created by @intrigeri on #13233 (Redmine)

Parent Task: tails/accounting#13248

Related issues

• Related to #13232 (closed)
• Related to #13243 (closed)
• Blocked by #11912 (closed)
• Blocked by #12636 (closed)
• Blocked by #12528 (closed)
• Blocked by #12596 (closed)
• Blocked by #12604 (closed)
• Blocked by #13413 (closed)
• Blocked by tails#13422 (closed)
• Blocked by #13433 (closed)
• Blocked by #13518 (closed)
• Blocked by #13526 (closed)
• Blocked by #13527 (closed)
• Blocked by #13583 (closed)
• Blocked by #13581 (closed)
• Blocked by #13579 (closed)
• Blocked by #14695 (closed)
• Blocked by #14730 (closed)
• Blocked by #14732 (closed)
• Blocked by #14737 (closed)