The upcoming 3.1 release of the Forgeo runner will allow to specify
which template and release must be must be used for a LXC
container. It also defines the lxc:// scheme as distinct from the
host:// scheme.
The host:// scheme is documented to be used for running jobs directly
from the host, which was not possible with the Forgejo runner versions
prior to 3.1
(cherry picked from commit 9c0d4b25e5)
See 9b698362a3
Also remove the token line from the .runner file. It is confusing and
difficult to explain because it is different from the registration
token. It really is a shared secret between the runner and the Forgejo
instance that has a purpose which is entirely different.
(cherry picked from commit 142d8a03d1)
