feat(gluon): update to 2023.2.4

remove explicit "firewall" and "urngd" packages

... as recommended at
https://forum.freifunk.net/t/fehler-file-system-partition-too-big/24139/3 .

I am not aware that we explicitly want these packages; so they should only
be pulled in as dependencies from other packages, if necessary.

feat(gluon): update to 2023.2.3

Empty commit to force another Jenkins build

fix(image-customization.lua): move away from site.mk (required by v20…

…23.2) + add tls packages

solves #54

feat(gluon): update to 2023.1.1

fix(dns): add cacheing again

feat(gluon): update to 2022.1.4

feat(gluon): update to 2022.1.3

feat(gluon): update to 2022.1.1