new_ssl: Send CA list during Certificate Request

[Wil Tan]

Hello,

Apologies if you received a duplicate. This is a resend as I was not
subscribed to the list previously.

I'd like to submit the following patch:

 git fetch git://github.com/wil/otp.git ssl_certreq_send_ca_list

It works for me (i.e. sends a list of distinguished names of
acceptable CAs, as opposed to an empty list) with OpenSSL s_client,
and also Java's SSL client implementation.

=wil