Refs. sysadm-environment#5543

Support bullseye and bookworm (maybe more, only checked those).

Refs. sysadm-environment#5543

Refs. sysadm-environment#5543

Refs. sysadm-environment#5543

Refs. sysadm-environment#5530

Refs. sysadm-environment#5532

Refs. sysadm-environment#5530

Refs. sysadm-environment#5532

Refs. sysadm-environment#5532

It's now the stable distribution.

Refs. sysadm-environment#5519

Refs. sysadm-environment#5519

Based on esnode8's first installation tryout failure.

Refs. sysadm-environment#5519

Refs. sysadm-environment#5519

Refs. sysadm-environment#5519

Earlier this year, we had to adapt the routine to be able to define the net devices and
the interfaces diffently than the default names (net0, ...). It worked at the time
because we declared those in the $(hostname).yaml configuration file. But now, trying to
use the default values (without specifying those new entries), the routine does not
work. The cli j2 is not happy about non declared template values (IPXE_NET, ...) [1]

This fixes it by using temporary templates which gets adapted through sed to fill-in the
holes. Once done, the temporary templates are cleaned up.

[1]
```
jinja2.exceptions.UndefinedError: 'IPXE_NET' is undefined
```

Refs. sysadm-environment#5519

Refs. sysadm-environment#5519

(it was manually updated on the server)

Related to sysadm-environment#5386

Related to sysadm-environment#5386

Refs. sysadm-environment#5367

This fails the postinstallation step altogether (during the install phase).

Refs. sysadm-environment#5367

Refs. sysadm-environment#5367

Refs. sysadm-environment#5367

Refs. sysadm-environment#5367

Refs. sysadm-environment#5367

Refs. sysadm-environment#5367

Fix formatting and some typos

Refs. sysadm-environment#5367

Fix formatting and some typos

Only tested for the HP servers bought at the end of 2023

Related to sysadm-environment#5312

Related to sysadm-environment#5288

It was not working for the old beaubourg machine whose interfaces named
differed.

Refs. sysadm-environment#5250

Refs. sysadm-environment#5250

And fallback generation to the default hard-coded name otherwise.

Refs. sysadm-environment#5250

Previously known as beaubourg.

Refs. sysadm-environment#5251

Ref. sysadm-environment#5069

Related to sysadm-environment#5042