1. In `wolfSSL_d2i_DHparams()`, when setting the internal key on a WOLFSSL_KEY, set the flag inSet. 2. Not a leak, but in `wolfSSL_EVP_PKEY_set1_DH()`, only allocate one buffer to store the flat key. Saves an alloc, memcpy, and free.
1. In `wolfSSL_d2i_DHparams()`, when setting the internal key on a WOLFSSL_KEY, set the flag inSet. 2. Not a leak, but in `wolfSSL_EVP_PKEY_set1_DH()`, only allocate one buffer to store the flat key. Saves an alloc, memcpy, and free.