datastorage/test: improve scalability and performance

datastorage: convert to linked lists and optimise use of pointers
datastorage: AP, client, probe, auth entry and MAC list converted to
             linked list
datastorage: functions adjusted to take pointers as parameters
datastorage: optimised sort and search functions added
mac_utils: struct dawn_mac added and comparisons adjusted
general: adjust code to  call new datastorage functions
test_storage: large scale 100 AP, 3000 client, 70k probe added

[fix commit]
Signed-off-by: Nick Hainke <vincent@systemli.org>

src/main.c

@@ -92,4 +92,4 @@ int main(int argc, char **argv) {
     dawn_init_ubus(ubus_socket, hostapd_dir_glob);
 
     return 0;
-}
+}