Allow to set loglevel to something like warning

[szaimen]

Hi, after reading the server.conf.in, I got the impression that it is not possible to set the loglevel.

In order to keep the logs clean from info logs I would like to ask if it would be possible to add a config value to set the loglevel to something like warning so that only warning or more crucial errors get shown.

Thanks a lot in advance! :)