Remove the use of hostname
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# Description:
Inetutils' `hostname` is problematic and we want to get rid of it (also see https://gitlab.archlinux.org/archlinux/packaging/packages/filesystem/-/issues/7 for a yearlong blocker due to inetutils in general).
Debian seems to provide [its own hostname](https://sources.debian.org/src/hostname/3.23%2Bnmu2/) as a drop-in replacement, which appears to be also used by Fedora.
Other implementations appear to be provided by gettext etc.
# Additional info:
* package version(s): all
* config and/or log files:
* link to upstream bug report, if any:
# Steps to reproduce:
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1.
issue