log_level config option not recognized

[BryantD]

Currently the log_level directive is not recognized; I'm running 1.4.5 but I think this behavior also exists in trunk.

In Munin/Common/Config?.pm, the hash %legal contains all recognized configuration file directives. log_level is not among them. If my understanding of the code is correct, the is_keyword function checks directives against that hash and returns an error if a directive is absent. When I add a log_level directive to my configuration file and run munin_update, I do in fact get an error. When I add log_level to %legal, the error goes away.