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Add a type for wikijs.

See merge request !15

See https://github.com/Requarks/wiki/issues/1325.

Add __mail_alias, __dma* types

See merge request !6

# Conflicts:
#   scripts/run-shellcheck.sh

__netbox type

See merge request !12

__netbox type improvements

See merge request !17

Mostly invalid links ..

This is not required any more because it was completly replaced by
`python3-venv`. The venv handling is already given to `__pyvenv`.

Mostly added notes of what does not work that well.

Now, the venv and pip things are done before the program files are
replaced, which should minimize the outage where the application is not
available.

The first one was deprecated by the second one.

Now, the python venv is now created via `pyvenv` or `python3 -m venv`
instead of the legacy `virtualenv`. For this, not all python processes
from the venv need to be stopped.

Migration from previous versions of this type may be difficult, but
solvable if the venv will be recreated.

To avoid an error from pip, it will be checked if there are packages to
uninstall. This is better than just doing `|| true`.

The Gunicorn type now supports systemd sockets only. With uWSGI, you can
choose between it and the native sockets based on the parameters chosen.
This is done because it could not be implemented to have multiple
protocols with the systemd sockets (so you may choose).

The systemd socket unit file is generally available, so both types use
the same script to generate the socket unit file.

Changed flag (force to ignore a non-existant directory), typo and
swapped arguments are done. Also, the process to stop all processes from
the virtal environment has changed: Now, it stops all potential services
and ignore errors (because a service doesn't exist).

After that, it sends a kill signal to all processes and then gracefully
wait since there is no option to do that with systemd.

Mostly added -q to the pip calls. Also forced the temp directory removal.

This adds the force flag to `ln` to avoid aborts cause the link already
exists and so forth. It also adds robustness to the execution.

This code tries to remove packages not needed anymore. As it presumably
not removing dependencies, it's not that perfect pice of script.

The default value is set to preserve all data saved by netbox. As
explained in the manpage, it sets the directory for all data directories
to `~netbox/data/` (would resolve to `/opt/netbox/data/`), so upgrades
will not remove this data.