Ruby » Ruby master

• ext/openssl/ossl_digest.c: allow Digests to be created by sn, ln or
  oid.
• test/openssl/test_digest.rb: add tests for this.
  [Ruby 1.9 - Feature #4412] [ruby-core:35319]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32040 b2dd03c8-39d4-4d8f-98ff-823fe69b080e