[Advent] Dec 13 -- Santas Postbox (2)

Dear Participant of the Advent(2)!

Just now, Christian Dietrich opened a new door for us in our system-call Advent calendar:

| Dec 13 -- Santas Postbox (2) | | Article: https://ibr.cs.tu-bs.de/advent/13-postbox/ | Workload: ~118 source-code lines

Kind Regards! The council of ELFers