First version of the status engine implementation

The Status Engine allow the measurements of how many ModSecurity
instances are running around the world, as long as information
on how many times it had been restarted and so on. Everytime that
the server is started it perform a DNS query that is redirected
to our servers, that query constains information about the
ModSecurity version and it dependencies versions. It also sends a
unique indetification generate locally for the server, avoiding
counting the same server twice while generating the statistics.
This id is a sha-1 hash of the machine name + mac address of the
first network adapter. In this commit it is enabled by default,
in the release will be a configuration option to disable this
functionality. It also important to cite that the information
gather by this query will be also available in ModSecurity website
public open via a JSON stateless API. There will be an fancy
heatmap as well.

apache2/mod_security2.c

@@ -37,6 +37,7 @@
 #include "msc_lua.h"
 #endif
 
+#include "msc_status_engine.h"
 
 /* ModSecurity structure */
 
@@ -722,6 +723,8 @@ static int hook_post_config(apr_pool_t *mp, apr_pool_t *mp_log, apr_pool_t *mp_t
             ap_log_error(APLOG_MARK, APLOG_NOTICE | APLOG_NOERRNO, 0, s,
                     "Original server signature: %s", real_server_signature);
         }
+
+        msc_status_engine_call();
     }
 
     srand((unsigned int)(time(NULL) * getpid()));