The DebugLog implementation was modified to use shared memory
to keep the information about the opened files and file handles.
The modification was necessary to avoid race-conditions. This
commit also closes the issue SpiderLabs/ModSecurity-nginx#17
- Added reference counts to Rule and AuditLog;
- Some memory leaks were removed, including GeoLookup;
- Deal better with parser errors;
- Overriding the AutlogLogWritter destructor.
