[Advent] Dec 21 -- Let the Children Speak up!

Dear Participant of the Advent(2)!

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

| Dec 21 -- Let the Children Speak up! | | Article: https://ibr.cs.tu-bs.de/advent/21-sendfd/ | Workload: ~155 source-code lines

Kind Regards! The council of ELFers