memleaks detected

[ChristianSch]

==4896== HEAP SUMMARY:
==4896==     in use at exit: 424,711 bytes in 906 blocks
==4896==   total heap usage: 1,922 allocs, 1,016 frees, 975,723 bytes allocated
==4896==
==4896== LEAK SUMMARY:
==4896==    definitely lost: 4,079 bytes in 41 blocks
==4896==    indirectly lost: 6,404 bytes in 34 blocks
==4896==      possibly lost: 5,280 bytes in 129 blocks
==4896==    still reachable: 37,942 bytes in 393 blocks
==4896==         suppressed: 371,006 bytes in 309 blocks

though I am not sure this is our fault but rather of cJSON/curl.