* 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/trunk@9094 b2dd03c8-39d4-4d8f-98ff-823fe69b080e