fallback scenarios.

* ext/openssl/ossl_pkey_dsa.c
* ext/openssl/ossl_x509req.c
* ext/openssl/ossl_pkey_rsa.c
* ext/openssl/ossl_pkey_ec.c
* ext/openssl/ossl_ssl_session.c
* ext/openssl/ossl_x509crl.c
* ext/openssl/ossl_pkey.c
* ext/openssl/ossl_pkey_dh.c
* ext/openssl/ossl_x509cert.c
* ext/openssl/ossl_pkcs7.c: Use OSSL_BIO_reset.

* ext/openssl/ossl_ssl.c
* ext/openssl/ossl_cipher.c
* ext/openssl/ossl_pkey_ec.c
* ext/openssl/ossl_pkcs12.c
* ext/openssl/ossl_ssl_session.c: Replace rb_raise occurences by
  ossl_raise. This automatically flushes OpenSSL's error queue.

* ext/openssl/ossl_pkcs7.c: Raise error if DER fallback for parsing
  fails.

* test/openssl/test_pkey_ec.rb
* test/openssl/test_pkey_dsa.rb
* test/openssl/test_pkey_rsa.rb: Add assertions that OpenSSL.errors is
  empty.

* test/openssl/test_pkey_rsa.rb: Remove initial OpenSSL.errors call in
  test_new.
  [ Ruby 1.9 - Bug #4885 ] [ruby-core:37134]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32199 b2dd03c8-39d4-4d8f-98ff-823fe69b080e