Bug#1016428: Replace Build-Depends: bsdmainutils (transitional)

[Chris Hofstaedtler]

Source: loadlin

Dear Maintainer,

I've noticed your package Build-Depends on bsdmainutils, which is a
transitional package since bullseye. Please switch to bsdextrautils
instead.

Preferably during the bookworm development cycle.

Thanks,
Chris