gluon-config-mode: down/upstream is kbit/s

The bandwidth limit input fields were missing a unit confusing users as to which value should be entered. It's kbit/s for both.
gluon-alfred: some announce.lua cleanup
ubiquity-bullet-m does also work with picostation

Closes #31
fastd: update to v14
Improve explanation of the Mesh-VPN
Merge pull request #32 from ohrensessel/improve-explanation

Improve explanation of the Mesh-VPN
gluon-luci-admin: change text "Expertmode" to "Expert Mode"
gluon-legacy: fix order of version_files and old_files handling
Validate site.conf
gluon-firewall: reject DNS queries from br-client (they should be accepted on local-node only)
gluon-core: add functions to unset sysconfig settings
Split gluon-setup-mode package out of gluon-config-mode

gluon-config-mode retains the luci frontend, all setup scripts and config is
moved to the new package.
Merge branch 'main-master'
Merge branch 'master' of github.com:ffrl/packages