Michael Vogt c3c735bd09 hostname: add ? and $ in systemd.hostname= kernel cmdline ...

Similar to the support for ?/$ in /etc/hostname and the credentials
we now add this to the kernel commandline systemd.hostname= option.

If the expansion fails, e.g. in the initrd where the word lists (and
possibly the machine ID) are not available yet, the option is ignored
and the usual default hostname logic applies. Once the host system is
up the expansion succeeds and the intended name is applied.

2026-06-20 14:26:41 +02:00

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