Make analysisd.debug in internal_options.conf work

This should allow the user to specify a debug level for the analysisd
daemon using the analysisd.debug option in the internal_options.conf.
The debug level specified on the command line takes precedence.

Original Pull Request: https://bitbucket.org/jbcheng/ossec-hids/pull-request/38/make-analysisddebug-in/diff