collectd/collectd — pull request #636 by dothebart (2014-06-07 10:07:11+00:00)
Title: Syslog: don't go all silent on 'debug' with production binary

so far if the collectd binary was compiled without debug, and the user configures loglevel 'debug' the logging will go all silent.
Imho this is orthogonal to what the user wants.
This approach will switch loglevel to 'info' and warn about an unsupported config value.