log_level config for munin itself

[cweiske]

Is your feature request related to a problem? Please describe.
I'm using CGI for graphing and HTML generation.
Nevertheless both munin-graph.log and munin-html.log get a new line every 5 minutes telling me that

2023/04/16 11:00:06 [INFO] graphing is cgi, do nothing
2023/04/16 11:05:07 [INFO] graphing is cgi, do nothing
2023/04/16 11:10:07 [INFO] graphing is cgi, do nothing

and

2023/04/16 11:00:06 [INFO] config generated (0.02 sec)
2023/04/16 11:00:06 [INFO] html_strategy is cgi. Skipping template generation
2023/04/16 11:05:07 [INFO] config generated (0.02 sec)
2023/04/16 11:05:07 [INFO] html_strategy is cgi. Skipping template generation
2023/04/16 11:10:07 [INFO] config generated (0.02 sec)
2023/04/16 11:10:07 [INFO] html_strategy is cgi. Skipping template generation

I know that. I don't want the logs filled with that info.

Describe the solution you'd like
A log_level config option for munin that behaves similar to log_level for munin-node.

Describe alternatives you've considered
I could hack my log level into /usr/share/munin/munin-graph as described in https://stackoverflow.com/questions/10646309/how-to-change-log-level-of-munins-munin-graph-log-munin-html-log-munin-limits
but that would mean I lose the change with the next update.

Additional context
Debian 11, munin 2.0.67-3