Reviewed by: steve

Fix memory leaks.

Submitted by: Robin Seggelmann <seggelmann@fh-muenster.de>
Reviewed by: steve

Support for TLS/DTLS heartbeats.

Submitted by: Peter Sylvester <peter.sylvester@edelweb.fr>
Reviewed by: steve

- remove some unncessary SSL_err and permit
an srp user callback to allow a worker to obtain
a user verifier.

- cleanup and comments in s_server and demonstration
for asynchronous srp user lookup

Submitted by: Tianjie Mao <tjmao@tjmao.net>
Reviewed by: steve

Fix incorrect comma expressions and goto f_err as alert has been set.

Submitted by: Robin Seggelmann <seggelmann@fh-muenster.de>
Reviewed by: steve

Add SCTP support for DTLS (RFC 6083).

New function to retrieve compression method from SSL_SESSION structure.

Delete SSL_SESSION_get_id_len and SSL_SESSION_get0_id functions
as they duplicate functionality of SSL_SESSION_get_id. Note: these functions
have never appeared in any release version of OpenSSL.

Submitted by: Paul Green <Paul.Green@stratus.com>
Reviewed by: steve

Improved PRNG seeding for VOS.

PR: 2655

PR: 2657

Submitted by: Peter Sylvester <peter.sylvester@edelweb.fr>
Reviewed by: steve

Remove unnecessary code for srp and to add some comments to
s_client.

- the callback to provide a user during client connect is
no longer necessary since rfc 5054 a connection attempt
with an srp cipher and no user is terminated when the
cipher is acceptable

- comments to indicate in s_client the (non-)usefulness of
th primalaty tests for non known group parameters.