Changes between 0.9.1c and 0.9.2
+ *) Add prototype for temp key callback functions
+ SSL_CTX_set_tmp_{rsa,dh}_callback().
+ [Ben Laurie]
+
*) Make DH_free() tolerate being passed a NULL pointer (like RSA_free() and
DSA_free()). Make X509_PUBKEY_set() check for errors in d2i_PublicKey().
[Steve Henson]