Feedback to be addressed

[nicorusti]

• [ ] with RPKI there would be circular dependencies (between communication), that SCION avoids (circular analysis figure in book)

Figures 6.1 and 6.2 in the new book show dependencies,
  we don't want to introduce circular dependencies.
  Here's also a new paper that shows how the circular dependency can
  be misused: https://arxiv.org/pdf/2205.06064.pdf
  https://www.usenix.org/system/files/sec22fall_hlavacek.pdf
  Stalloris: RPKI Downgrade Attack
  Tomas Hlavacek, Philipp Jeitner, Donika Mirdita, Haya Shulman, Michael Waidner
  USENIX Security Symposium, 2022

• [x] Life of a packet somewhere (here or in overview draft)
• [x] Design goals: prefix hijacking --> traffic hijacking (as there are no prefixes)

[nicorusti]

Handled last two points in #15