These config changes are not necessary anymore, as it's now the default
behavior.

Ref: https://github.com/freifunk-gluon/gluon/pull/2235#issuecomment-859654947


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

All targets now use OpenWrt device abstraction. Thus, all targets now
can be built using a per-device RootFS.

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

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

The kernel build requires rsync.

ramips-mt76x8: add Xiaomi Mi Router 4A (100M Edition)

gluon-mesh-vpn-core: fix potential null pointer dereferences

gluon-mesh-vpn-tunneldigger: fix Lua mesh-vpn provider module location

read_stdout can return NULL and thus the return value need to be checked
prior to accessing it.

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

In case the limit_ingress or limit_egress options are not present in
gluon's mesh_vpn section the respondd provider compares a string literal
with a NULL pointer, crashing respondd.

Check both pointers prior to comparing them in order to mitigate this
issue.

Suggested-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: David Bauer <mail@david-bauer.net>

treewide: use lua-jsonc instead of lua-cjson for JSON handling during build

64148a9baf14 lua-jsonc: add host build support
c2623391bf42 lua-jsonc: do not link against liblua

I mixed up two separate improvements into one, this change aims to
clarify them based on a suggestion and conversation with @T-X.