Drop the Gluon version reference from the site configuration used for
the CI builds.

These version indicators were most likely just copied from the example
site in the docs, where the version information makes sense. However,
the CI site is always built for a specific Gluon version and therefor
commit.

This avoids editing the version for each release.

Signed-off-by: David Bauer <mail@david-bauer.net>

Signed-off-by: David Bauer <mail@david-bauer.net>

Include the file-extension with the image-customization.lua file. This
will ease work with editors providing syntax highlighting, as they now
properly detect the file-type.

Signed-off-by: David Bauer <mail@david-bauer.net>

Now we use the new Image-customization framework in Gluon, we need to
also update the docs so examples and descriptions are acurate again.

Signed-off-by: David Bauer <mail@david-bauer.net>

(cherry picked from commit b313a631)

This updates the site.conf based on docs/site-example/site.conf for v2022.1

Do not fail the new check that good_signatures ≤ #pubkeys.

Has gone unused for a while now and if it is needed again it can be
retrieved from the history.

Do not mix two different HTTP libraries in one script. This fixes a
warning:

/var/lib/jenkins/slave.py:82: DeprecationWarning: URLopener style of invoking requests is deprecated. Use newer urlopen functions/methods

This simple implementation has the disadvantage that it stores the whole
file in RAM, but this isn't an issue for the 1.5MB slave.jar.

Fixes a warning:

/usr/local/lib/python3.7/dist-packages/urllib3/connectionpool.py:1004: InsecureRequestWarning: Unverified HTTPS request is being made to host 'build.ffh.zone'. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings

This allows us to make use of builders that can't run virtual machines.

Drop the TMUX environemnt variable, it's not needed anymore.

This will hopefully make CI runs more robust and recover stale workers.

This is required to build the next branch which requires rsync to be
available.

Rsync is a requirement for OpenWrt master and therefore our next
branch. Currently builds on x86-64 error out due to missing rsync:

/bin/sh: 1: rsync: not found