branches: 1.2.2; 1.2.8; 1.2.16; 1.2.20;
pull in some patches from upstream CVS, following secadv_20120104.txt:
-rev.21964 for DTLS Plaintext Recovery Attack (CVE-2011-4108)
-rev.21961 for Uninitialized SSL 3.0 Padding (CVE-2011-4576)
-rev.21456+21954 for Malformed RFC 3779 Data Can Cause Assertion Failures
(CVE-2011-4577)
(rev.21456 is not mentioned in the advisory, but there is code overlap)
-rev.21958 for SGC Restart DoS Attack (CVE-2011-4619)
-rev.21956 for Invalid GOST parameters DoS Attack (CVE-2012-0027)