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This PR does two small things: 1. The log level, in case it is unset, will now be "calculated" from `/etc/dms-settings` and not always default to `info`. This way, we can ensure that more often than not, the log level the user chose when starting DMS is used everywhere. 2. I noticed that the way I obtained the log level could be used to obtain any env variable's log level. I therefore added a function to `utils.sh` in case we use it in the future.