Only store encoded versions of peer and configured signature algorithms.
Determine shared signature algorithms and cache the result along with NID
equivalents of each algorithm.

TLS v1.2. These are sent as an extension for clients and during a certificate
request for servers.

TODO: add support for shared signature algorithms, respect shared algorithms
when deciding which ciphersuites and certificates to permit.

for debugging purposes. Needs "enable-ssl-trace" configuration option.

PR: 2830
Submitted by: Robin Seggelmann

specific code path.

improve performance on Atom and P4.

PR: 2810

Reported by: Constantine Sapuntzakis <csapuntz@gmail.com>

Fix possible deadlock when decoding public keys.

Reported by: Phil Pennock <openssl-dev@spodhuis.org>

Make renegotiation work for TLS 1.2, 1.1 by not using a lower record
version client hello workaround if renegotiating.

Submitted by: PK <runningdoglackey@yahoo.com>

Correct ciphersuite signature algorithm definitions.

DTLS to fix DoS attack.

Thanks to Codenomicon for discovering this issue using Fuzz-o-Matic
fuzzing as a service testing platform.
(CVE-2012-2333)