* ext/openssl/ossl_pkcs7.c: new class OpenSSL::PKCS7::RecipientInfo.
  this class wraps PKCS7_RECIP_INFO struct.

* ext/openssl/ossl_pkcs7.c: OpenSSL::PKCS7::Signer is renamed to
  OpenSSL::PKCS7::SignerInfo. ("Signer" remains as an alias of
  SignerInfo.)

* test/openssl/test_pkcs7.rb: new file.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@9114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e