CRYPTO_set_mem_functions() works only until the first allocation is done:
* remove the second CRYPTO_set_mem_functions() call
* check whether the first CRYPTO_set_mem_functions() call worked
* stricter memory checks (==1, not >1, etc)
* as coc_malloc cannot be removed, make the counter a bit cheaper
* only do the check for OpenSSL 1.1 (because of OpenSSL 1.0 bug)