This also fixes the type of a few fields which were strings instead of numbers.

Original patch by Daniel Ehlers <danielehlers@mindeye.net>

For security reasons we should not accept incoming packets per default
and instead allow specific services on specific interfaces.

/lib/gluon/release had been lost during the conversion to the new site config
format.

gluon-autoupdater: Always allow forced autoupdate.

On nodes with autoupdate disabled the cmdline parameter '-f' has no
effect. But using the autoupdater for manual updates is quite handy.

gluon-alfred: replace announce.sh with lua script