Fix mishandling of valid ssl options

[Rory Byrne]

Hello,

  git fetch git://github.com/jinsky/otp.git ssl_opts_fix

Using the new ssl implementation, some valid options are causing badarg
exceptions. The most important of these is 'fail_if_no_peer_cert', 
but it also effects two undocumented options, 'verify_client_once' and 
'cb_info'.

Thanks,

Rory