- SSLContext#client_cert_cb=(aProc). it is called when a client
    certificate is requested by a server and no certificate was not
    set for the SSLContext. it must return an Array which includes
    OpenSSL::X509::Certificate and OpenSSL::PKey::RSA/DSA objects.
  - SSLContext#tmp_dh_callback=(aProc). it is called in key
    exchange with DH algorithm. it must return an OpenSSL::PKey::DH
    object.

* ext/openssl/ossl_ssl.c (ossl_sslctx_set_ciphers): ignore the
  argument if it's nil.

* ext/openssl/ossl_pkey.c
  (GetPrivPKeyPtr, ossl_pkey_sign): should call rb_funcall first.
  (DupPrivPKeyPtr): new function.

* ext/openssl/ossl_pkey_dh.c: add default DH parameters.

* ext/openssl/ossl_pkey.h: ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@8277 b2dd03c8-39d4-4d8f-98ff-823fe69b080e