Adjust some old scripts to gluon (TODO: reimplement backwards compatiblity)

.../lib/gluon/upgrade/core/0.3.1/010-freifunk-migrate-config

...lib/gluon/upgrade/core/0.3.1/012-freifunk-migrate-network

...-core/files/lib/gluon/upgrade/core/0.3.1/020-lff-wireless

...uon-core/files/lib/gluon/upgrade/core/0.3.1/021-lff-fastd

...lib/gluon/upgrade/core/0.3.2/011-update-avahi-daemon-conf

...les/lib/gluon/upgrade/core/0.3.2/020-lff-migrate-mesh-vpn

.../files/lib/gluon/upgrade/core/0.3.2/021-lff-migrate-peers

...ore/files/lib/gluon/upgrade/core/initial/010-gluon-system

...re/files/lib/gluon/upgrade/core/initial/011-gluon-network

...core/generate/lib/gluon/upgrade/core/initial/020-wireless