instance: add progname as ptr to argv[0]

src/suricata.c

@@ -2385,6 +2385,7 @@ int main(int argc, char **argv)
     SCInstance suri;
 
     SCInstanceInit(&suri);
+    suri.progname = argv[0];
 
     sc_set_caps = FALSE;
 

src/suricata.h

@@ -155,6 +155,7 @@ typedef struct SCInstance_ {
     struct timeval start_time;
 
     char *log_dir;
+    const char *progname; /**< pointer to argv[0] */
 } SCInstance;