retire majus

in #40692 (closed), we upgraded majus to Debian bookworm, yay!

but unfortunately, the transifex-client package has been removed from debian, so it won't be covered by security support and has not been upgraded to the latest release.

so we need to find a solution for this. i favor completely retiring the host and @emmapeel seemed opened to the idea in #41252 (comment 2993038)

so what's the next step here, @emmapeel you were saying there were some leftovers to garbage-collect?

checklist:

1. announcement
2. nagios
3. retire the host in fabric
4. remove from LDAP with ldapvi
5. power-grep
6. remove from tor-passwords
7. remove from DNSwl
8. remove from docs
9. remove from racks
10. remove from reverse DNS