New method SSLContext#setup to aid C extension writers.
* test/openssl/test_ssl.rb: Add tests for new method and sessions.
Use threads for ssl server instead of forking.
* ext/openssl/ossl_version.h: Bump version.
* ext/openssl/ossl_x509ext.c: Fix warnings.
* test/openssl/utils.rb: Fix warnings.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16111 b2dd03c8-39d4-4d8f-98ff-823fe69b080e