validates ssl_options to only accept a hash or nil

[josedonizetti]

No description provided.

[rails-bot]

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @rafaelfranca (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

Please see the contribution instructions for more information.

[rafaelfranca]

Thank you for the pull request. Why is this needed?

[josedonizetti]

@rafaelfranca Hey, better to close it. 6+ months old, and as I didn't added anything on the description, can't really recall the reason. Thanks for looking it though.