Following the rename of master to main, update everything that
references the branch.

The Gluon Tunneldigger protocol handler hasn't received the care and
attention a core package, especially a VPN protocol, should.

Due to the works in #2102 it's no longer required to maintain
VPN handlers in the Gluon Core and they can be instead included via a
package feed.

Users who wish to continue using a supported core Gluon package are
encouraged to take a look at fastd in conjunction with it's null@l2tp method.
It offers roughly the same performance (it's using the same principle
of operation) and supports connections via IPv6 as a bonus.

In general it should be possible to change the VPN used protocol
asynchronously with a normal update.

If Gluon users wish to continue using tunneldigger the recomendation
is to participate in the development of tunneldigger inside our
community-packages.

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>

Fix the example config for the dns upstreams.

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

This reverts commit 543eb178.

Restores the dns caching configuration that should be feasible, since we
now require around 8 MB of flash.

Signed-off-by: Stefan Weil <sw@weilnetz.de>

The command was introduced in v2022.1 with #2459.

Co-authored-by: Jan-Niklas Burfeind <github@aiyionpri.me>

If the uci option 'gluon.wireless.preserve_channels' is set then the channel width of wireless radios (htmode) is preserved during updates, too.

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

- explain what happens on gluon-reconfigure
- show workflow to alter the wired network config
- update examples
- update 'has changed in' section

resolves #2474

Co-authored-by: Tom Herbers <mail@tomherbers.de>
Co-authored-by: David Bauer <mail@david-bauer.net>
Co-authored-by: Andreas Ziegler <dev@andreas-ziegler.de>

Co-authored-by: Tom Herbers <mail@tomherbers.de>
Co-authored-by: David Bauer <mail@david-bauer.net>
Co-authored-by: Andreas Ziegler <dev@andreas-ziegler.de>

closes freifunk-gluon/gluon#2603

Co-authored-by: Martin Weinelt <martin@darmstadt.freifunk.net>

- Restructure page
- Add information on how to add L2TPv3 offloading support to a build
  using configurable ciphers. The null method is not reocmmended anymore.
- Add notes and pointers regarding the gateway configuration to provide
  gateway admins with hints on how to modify their configuration to
  accommodate this new feature.
- Mention wireguard support

Based-on-patch-by: Felix Kaechele <felix@kaechele.ca>

2 spaces is the most common indentation width used in the docs; adjust
the rest for consistency.

Also change .editorconfig accordingly.

Replace occurences of ar71xx with ath79. Remove references of ar71xx
targets which are not relevant anymore.

Explains the behaviour when DATE is either in the future or in the past
and hints at how the firmware rollout can be controlled using the
PRIORITY variable.

Co-Authored-By: Martin Weinelt <martin@darmstadt.freifunk.net>

Document the behavior of the Outdoor mode when preserve_channels is
enabled.

Document the behavior of the Outdoor mode when preserve_channels is
enabled.

This reverts commit 4e070312.

The recommendation is not sufficient at this time, so revert it.

See #1898 for further discussion.

many AVM devices do not have RESET/WPS buttons. So use the otherwise unused DECT/PHONE button to boot the device into setup mode.

This patch allows to enter the setup-mode by pressing the phone button
(often labeled as DECT) in addition to WPS and reset button.

This patch is necessary to allow supporting boards without a WPS and reset
button (e.g. AVM FRITZ!Box 7312).