suricata: init output before detection

As we need to know if we should parse the signature metadata, we
have to parse the output configuration before initializing the
detection engine.

src/suricata.c

@@ -2842,11 +2842,12 @@ int main(int argc, char **argv)
     if (PostConfLoadedSetup(&suricata) != TM_ECODE_OK) {
         exit(EXIT_FAILURE);
     }
-    PostConfLoadedDetectSetup(&suricata);
 
     SCDropMainThreadCaps(suricata.userid, suricata.groupid);
     PreRunPostPrivsDropInit(suricata.run_mode);
 
+    PostConfLoadedDetectSetup(&suricata);
+
     if (suricata.run_mode == RUNMODE_CONF_TEST){
         SCLogNotice("Configuration provided was successfully loaded. Exiting.");
 #ifdef HAVE_MAGIC