Bug#1016431: Replace Build-Depends: bsdmainutils (transitional)

[Chris Hofstaedtler <zeha@debian.org>]

Source: sendmail

Dear Maintainer,

I've noticed your package Build-Depends on bsdmainutils, which is a
transitional package since bullseye. Please switch to one of the
packages replacing bsdmainutils instead.
Maybe bsdextrautils, if the program you are after is "ul".

Thanks,
Chris