docs: remove an unrelated/misleading link and fix headings

This was an idea (thought experiment?) from a Wireless Battlemesh ages
ago between batman-adv devs. Regarding what could be done to interconnect
isolated/separate WiFi mesh clouds on layer 3 without losing best path
metric information, without worsening/compromising on the best route decision.
And as a more sophisticated approach to the batman-adv gateway feature and
a potential replacement for tunneled batman-adv over VPN connections.

Which is the opposite of what the sentence in this Gluon README
is saying. And this never got implemented in either batman-adv nor Gluon.

Therefore removing this link to this old draft page.

The newly added information is way too verbose and non-practical for a
"Getting started". Therefore adding an "Overview" heading and moving the
"Getting started" back to where it originally was.

This adds a hint to the Repository on Github and makes it easier to recognize the license text

Goal is to cancel Worfklows for Pull Request if they become obsolte
due to new changes.
Without this workflows will continue running, wasting resources and
delaying the run of relevant workflows.
This situation will typically occour if a author of a PR notices an
error/typo/missing bit and pushes new changes to the branch.

This won't affect concurrent workflows for otherwise triggered
workflows (push, workflow_dispatch, tag, ...).

build: implement flexible site-selection system

This package allows to easily select the correct libustream implementation
without all communities having the need to manually change their included
packages.

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

bcm27xx: add support for Pi4 and switch bcm27xx from ext4 to squashfs

Remove legacy migrations. These predate the currently supported upgrade path,
therefore we no longer need them.

Signed-off-by: Magnus Frühling <skorpy@frankfurt.ccc.de>

Known issues:

* 11s is not working
* has no reset button, only SSH access, serial access or an external SD
  card update can return it to config mode at the moment
* LED: generally the red sys LED is working, including boot and failsafe
  blink patters, but:
  * sometimes not lit after boot
  * not blinking in config mode; instead sometimes either persistently on
    and sometimes persistently off after booting into config mode

Therefore adding it as broken.

However, due to its CPU power and small size still interesting as a VPN
offloader or WiFi rooftop core node (e.g. to Gluon'ify 5+60GHz devices).

Manifest aliases are added for upgrades from unreleased Gluon builds
and can be removed again at some point in the future.

Tested on a Raspberry Pi 4 Model B Rev 1.1.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

Similar to x86 build images with a squashfs instead of ext4 filesystem
on bcm27xx / for the Raspberry Pi. This allows to use sysupgrade
properly and allows to use the firstboot command.

Runtime tested on a Raspberry Pi 4. Build tested for the Pi 3 / bcm2710.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>

Load the site image-customization.lua file only on init. Previously, the
file was loaded on every device invocation.

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

Create an init routine which loads the environment only once instead
every evaluation.

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

modules: update to latest HEAD

53ea3b8 libplatforminfo: update bcm27xx target name
28a35ea libplatforminfo: drop obsolete ar71xx-mikrotik target

4e9c89801 snowflake: update to 2.8.0
b38eb34ad wifidog: make it compile again with recent version of WolfSSL
b6e00e30e php8: update to 8.2.13
1ee27592c tang: silence errors on first installation
5741b3374 haproxy: update to v2.8.5
8ebf99b7e adblock-fast: update to 1.1.1-1
40a730516 python3: Update to 3.11.7, refresh patches
755ad8d13 unbound: fix `create_host_record_from_host` error when `dns` is not set
26afa741e unbound: create extra host records from DHCP static leases
07e8278e5 golang: Update to 1.21.5
c82697da6 python3-ble2mqtt: bump version to 0.2.1
bb3a34020 python3-bleak: bump version to 0.21.1
5c9de3c0a python3-dbus-fast: bump version to 2.20.0
4bc836e48 syncthing: fix duplicate command line parameters on service
e3148ef0f https-dns-proxy: only restart firewall when needed
73b689f96 adblock-fast: better allow-listing
7abcfbccf nebula: update to 1.8.0
213d2df70 curl: update to 8.5.0
341d817e2 adblock-fast: bugfix: block domains from config when not using block-lists

59fd8f08cf mvebu: fix RTC of IEI-World Puzzle M90x devices
fd6831731b mediatek: add SPDX header for Confiabits MT7981 DTS
1598d87309 mediatek: add support for Confiabits MT7981
9cf5769636 mwlwifi: update to version 10.4.10-20231120
c9c35dca7a mt76: Add firmware package for MT7922
20615c410b kirkwood: fix Ctera C200 V1 ubi part name
ad363f6910 ath79: make boot-leds service executable
fcf08d9db6 ipq807x: fix edgecore EAP102 lan/wan
0186032f6a mediatek: filogic: add Acelink EW-7886CAX support
583e67222e mediatek: filogic: reorder alphabetically
b95e9dae43 mediatek: fiilogic: device tree `switch@1f` fix
af740e9ef9 mediatek: fix the name of buswidth to bus-width

As the boardname-based image name setting was broken for bcm27xx due to the
target rename, we need to keep the model-based names updated for now.

Add all model strings currently seen on the Multimeshviewer and update
the comments accordingly.

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>

If we align the table keys of the selection table to match the return
object of get_selections, we can omit creating a new return object.

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

Print a warning in case users attempt to build Gluon using a site.mk
which containes deprecated GLUON_FEATURES or GLUON_SITE_PACKAGES.

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>

This allows the negation of already activated features oder packages by
Gluon using the image-customization.

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

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

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

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

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

Implement a flexible system for handling site-defined features as well
as packages.

This system is inspired by the existing feature-system and allows for a
more flexible approach for selecting specific packages for devices.

Features are now defined in a `features` file in the site-root. The same
goes for packages.

These files are sequentially evaluated and the device-package list is
evaluated for each device independently.

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

CI: update filters

Update the filters to make the CI happy again.

This was not caught by the CI actions of #3027, as the PR had been open
for too long.