implementation is not required to maintain per session state. It only applies
to TLS and there is no SSLv3 implementation.
-The callback is available when the OpenSSL library was built without
-I<OPENSSL_NO_TLSEXT> being defined.
-
The callback function I<cb> will be called for every client instigated TLS
session when session ticket extension is presented in the TLS hello
message. It is the responsibility of this function to create or retrieve the