The following features are available in Busybox ash, so we don't need to
warn about them for runtime scripts:

- local keyword
- echo -n / -e
- String indexing

These warnings are new in shellcheck 0.7.2, which would otherwise fail
for various scripts.

0.7.1 complains about unescaped backslashes in double quotes (which are
intepreted by printf in the two affected places). While the warning was
retired with shellcheck 0.7.2, it seems like a good idea to fix it
anyways.

Target build cleanup

gluon-status-page: use UCI + iwinfo to get channel information

Resolves #2362

Clean up obsolete upgrade migrations

More migration code from 2016.

The file /lib/gluon/version/core hasn't existed since early 2014, so
this whole script is obsolete.

modules: update OpenWrt & packages

We currently don't have any deprecated devices, so it doesn't make much
sense to force every site to specify this variable. Make it default to 0
instead.

All our targets use the OpenWrt device abstraction. Since commit
6ba58c9b17c90e41b521d796ab76e5723ee017170
("generic: force per-device RootFS") building non-device targets is not
possible anymore, so we can remove these obsolete handlers.

7a15a271a mwan3: fix mwan3 flush conntrack table call
2f52958e0 golang: Update to 1.17.5, add patch
f7973fc7a adguardhome: update to 0.107.0
d5ce7603d xray-core: Update to 1.5.2
60419af87 xray-core: Update to 1.5.1
c8b6cffcd yq: Update to 4.16.2
a21e79094 adblock: 4.1.3-4

4dddb7ca36 tcpdump: libpcap: Remove http://www.us.tcpdump.org mirror
47a5b9744b linux-firmware: amd: consolidate amd's linux-firmware entries
6003752394 linux-firmware: Update to version 20211216
7306b9e810 linux-firmware: update to 20210511
d0b0ebf966 linux-firmware: update to version 20210315 and trim down broadcom FW
209c77e90f linux-firmware: ath10k: add support for Qualcomm Atheros QCA9377
2ed471a12a firmware: intel-microcode: update to 20210608
a20e9474df cypress-nvram: fix firmware is not exist for raspberry pi compute 4
dbe2a6343f base-files: fix service_running check
e81dd8a10a base-files: upgrade: fix efi partitions size calculation
8166bbf680 ccache: update to 4.2.1
5e2a2b086c mvebu: Turris Omnia: use SFP module, if present
24e564d327 mvebu: backport Turris Omnia DTS changes to 5.4
32c74552b2 kernel: bump 5.4 to 5.4.168
a8ad881b83 apm821xx: fix WD MyBook Live DUO USB-Port
d655eea053 hostapd: only attempt to set qos map if supported by the driver

Add some explanation when `make update` needs to be run again.

Co-authored-by: David Bauer <mail@david-bauer.net>

docs: consistent indentation + minor fixes

announced was renamed to respondd in 2016. Let's remove the obsolete
migration code.

With older versions of the RTD theme, paragraphs in nested lists would
lead to inconsistent spacing. This has been fixed, so we can remove our
workaround to use line blocks instead of paragraphs.

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

Also change .editorconfig accordingly.

modules: update openwrt

Using `make container` or, if you don't have automake/gmake on your host
system, `./scripts/container.sh` will build an image for the current
branch your are on and drop you into a shell running inside a container
using that image.

From there all tooling required to work on Gluon is available.

Supports both podman (preferred) and docker.

a85b7c7 opennds: Release v9.5.1 (for 21.02)
d4622d8 ohybridproxy: revert to default log level
47436b0 batman-adv: Prevent use from libc headers to not build with BIG_ENDIAN

a87752712 python-lxml: update to version 4.6.5
944e937d9 php8: update to 8.0.14
4308764d8 seafile: remove myself as maintainer of these packages
aa7454e46 python-packages: remove myself as maintainer
f01af1e66 crowdsec-firewall-bouncer: update to 0.0.18
f4519023c php7: update to 7.4.27
e818e3ed3 nano: update to version 6.0
e7e91ca07 libqmi: fix missing CONFIG_ prefix
7164762fd ldns: update to 1.8.1
59e70a29c unbound: update to 1.14.0
e6628357a htop: update to 3.1.2-1
c28d3dcb5 htop: explicitly disable some build options
97574e9de htop: update to 3.1.0
6ddb16bc3 node: bump to 14.18.2
4f251d6df hwdata: update to version 0.354
92129f9cf python-babel: update to version 2.9.1
134bae302 python-babel: update to version 2.9.0
5750f8337 knot: update to 3.1.4
149c3014f gnutls: don't run aclocal --install
4ee031906 bind: bump to 9.17.20
cbc9de5f1 knot-resolver: update to version 5.4.3
bb89205f5 yq: Update to 4.16.1
1743adc23 python3: update to version 3.9.9
5ebaa73d5 msmtp: update to version 1.8.1.9
a9fed2403 mariadb: Create compatibility symlinks
0e40e25fc mariadb: Install all supporting sql files
753fe1d21 mariadb: Tweak default configuration
ed572e389 mariadb: Init script improvements
fb4c9e5c4 mariadb-common: Drop package and adjust configuration
e84c48890 nextdns: Update to version 1.37.7
75a0ffc21 nextdns: Update to version 1.37.6
a97bd3135 syslog-ng: update to version 3.35.1
3cad5b76d yggdrasil: bump to 0.4.2
a7a724733 yggdrasil: uci ifname is now known as device
271961e3a nextdns: Update to version 1.37.5
5d82c0716 ddns-scripts: use HTTPS for spdyn
ff5728497 icu: bump to 70.1
8162066e1 curl: update to 7.80.0
4877a3b72 yq: Update to 4.15.1
4f78eb825 crowdsec: update to 1.2.1 crowdsec-firewall-boucer: update to 0.0.16
103484c4b nebula: update to 1.5.0

e1b79b1dc3 mac80211: optimize airtime fairness code to reduce cpu usage
5414aa88ae kernel: backport the upstream implementation of threaded NAPI to 5.4
4b52d89531 mac80211: Update toversion 5.10.85
5a8faa407a bcm53xx: sysupgrade: fix support for Luxul's legacy firmware format
052619a71b bcm4908: build chk image for Netgear RAXE500
d5f9c6729f bcm4908: start working on Netgear RAXE500 image
76ccf10c59 bcm4908: enable MTD_CMDLINE_PARTS
97b76de576 bcm4908: continue work on images for U-Boot based devices
1da38bb4db bcm4908: backport upstream DT commits
570c26f664 bcm4908: add watchdog support
027dd3c50b bcm4908: start work on images for devices using U-Boot
2c1f27bf4b bcm4908img: detect Linksys images
1d1c695273 bcm4908img: store offset of tail data
f24e745b25 bcm63xx-cfe: update to the latest master
c808c55b39 bcm53xx: sysupgrade: refactor handling different firmware formats
29f73a7968 bcm53xx: sysupgrade: simplify extracting image from Seama seal
0ebf62e7f4 bcm53xx: enable Linksys EA6300 & EA9200 builds
67978e4ce5 bcm53xx: backport the latest upstream DT changes
6f9e9d978a bcm53xx: fix Luxul XWR-3150 LAN ports numbering
2912bba4cb otrx: update to the latest master
3d05cd40a6 otrx: use firmware-utils.git to avoid code duplication
14940aee45 kernel: bump 5.4 to 5.4.163
06547e0a58 ath79: add support for Xiaomi AIoT Router AC2350
c67509efd7 ramips: fix tl-mr3020-v3 switch topology to configure vlans via luci
5124b96e72 busybox: update to 1.33.2 bugfix release
266890bb12 mt76: update to the latest version
efc76b1361 mac80211: bump PKG_RELEASE
1276ef9c1c mac80211: fix tx aggregation locking issue
b1e684fa88 mac80211: fix queue assignment of aggregation start requests
462ccf90be mt76: update to the latest version
36848e2c29 uboot-lantiq: danube: fix hanging lzma kernel uncompression #2
4172a8e0ad lantiq: set maximum kernel size for P2812HNUF3
0e0192098a mac80211: backport fix for dealing with stripped IV on rx
77667a7eb6 hostapd: add a patch that allows processing auth requests for peers in blocked state
9127e5193e hostapd: bump PKG_RELEASE
4679c4ae25 mac80211: bump PKG_RELEASE
36c3103cba mac80211: add a fix for kernel warnings when forwarding packets in mesh mode
ea91ebedce mac80211: fix regression in SSN handling of addba tx

Declare the clock variable as extern in the header file.

Fixes compilation of gluon-ebtables-limit-arp with OpenWrt master:

multiple definition of `clock'; /gluon/openwrt/tmp/ccuynR0G.o:(.bss+0x230): first defined here

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

The migration is done very early, as other upgrade scripts depend on the
band setting through platform.device_uses_11a().

The 'hwmode' setting has been replaced with 'band' in OpenWrt to add
support for newer bands outside of 2.4G and 5G. Adjust Gluon accordingly.

[Matthias Schiffer: rebased, extended commit message]

The CI should be successful when there is nothing to check. Add if
condition as proposed in [1].

[1] https://github.com/dorny/paths-filter/issues/66#issuecomment-778267385

build-gluon.yml is not generated anymore.

Merge pull request #2340 from freifunk-gluon/dependabot/github_actions/actions/upload-artifact-2.3.1