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.

PR: 2657

PR: 2656

[from HEAD].

in question.

PR: 2648

 be the server FQDN: change it.
[Reported by PSW Group]

methods isn't presorted, it will be sorted on first read).

Submitted by: Adam Langley

Submitted by: Emilia Kasper

Submitted by: Adam Langley
Reviewed by: Bodo Moeller

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

Make SRP conformant to rfc 5054.

Changes are:

- removal of the addition state after client hello
- removal of all pre-rfc srp alert ids
- sending a fatal alert when there is no srp extension but when the
server wants SRP
- removal of unnecessary code in the client.