Debian PPA IPv6 address ends in deb:deb

Currently, at least:

> nslookup ftp.de.debian.org Server: 192.168.1.1 Address: 192.168.1.1#53

  Non-authoritative answer:
  Name:   ftp.de.debian.org
  Address: 141.76.2.4
  Name:   ftp.de.debian.org
  Address: 2a13:dd80:deb::deb

Just a nice easter egg for those of us debugging 404s on apt update...