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.
Merge pull request #18 from bb2gh-ossec/awiddersheim_analysisd_debug_internal

Make analysisd.debug in internal_options.conf work