Comment 1 for bug 364185

Here is a branch that impements this functionality by adding the add_client_CA and set_client_CA_list methods to SSL.Context.

In addition, I also exposed the SSL_get_client_CA_list as get_client_CA_list method of SSL.Connection objects. Without this testing wouldn't be possible.

The branch also contains some cleanup commits and commits with additional error checks. If you think that they need to be separated from this feature request, I'll open a new bug report.

The only thing missing are the docs, I'll work on that tomorrow. Otherwise, the branch should be ready for review.