feature: multithreading wip

include/thread.h

@@ -3,6 +3,7 @@
 #include <stdint.h>
 
 #include "host.h"
+#include "parsing.h"
 #include "response.h"
 #include "scan.h"
 
@@ -16,3 +17,5 @@ struct thread {
 };
 
 void *routine(void *p_data);
+int create_threads(const struct option_lst *options, char *ip_addr,
+                   struct response *responses);