Bug#1028115: init: Document requirements for being an alternative pre-dependency of init

[Lorenzo Puliti]

Package: init
Version: 1.65.2
Severity: normal
X-Debbugs-Cc: plorenzo at disroot.org

Dear i-s-h maintainers,

I intend to ask for the inclusion of runit-init into the pre-dep list
of this package right after the bookworm release. 
For now I'm following the list of suggestions provided by Simon McVittie [1]
in #923450 msg#15; please document your requirements.

Regards,
Lorenzo

[1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=923450