* lib/openssl/ssl.rb: Fix SSL client connection crash for SAN marked critical. The patch for CVE-2013-4073 caused SSL crash when a SSL server returns the certificate that has critical SAN value. X509 extension could include 2 or 3 elements in it: [id, criticality, octet_string] if critical, [id, octet_string] if not. Making sure to pick the last element of X509 extension and use it as SAN value. [ruby-core:55685] [Bug #8575] Thank you @nahi for providing the patch!
merge revision(s) 41805: [Backport #8575]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@42016 b2dd03c8-39d4-4d8f-98ff-823fe69b080e