Configuration file syntax was changed in v5. Change config file
accordingly.

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

Signed-off-by: Magnus Frühling <skorpy@frankfurt.ccc.de>

The typo in the label name as been fixed, update the labeller config.

The Gluon Tunneldigger protocol handler hasn't received the care and
attention a core package, especially a VPN protocol, should.

Due to the works in #2102 it's no longer required to maintain
VPN handlers in the Gluon Core and they can be instead included via a
package feed.

Users who wish to continue using a supported core Gluon package are
encouraged to take a look at fastd in conjunction with it's null@l2tp method.
It offers roughly the same performance (it's using the same principle
of operation) and supports connections via IPv6 as a bonus.

In general it should be possible to change the VPN used protocol
asynchronously with a normal update.

If Gluon users wish to continue using tunneldigger the recomendation
is to participate in the development of tunneldigger inside our
community-packages.

according to the paths they touch.