Always use serf_context_bucket_socket_create to create the socket_bucket. This ensures that the traffic need to setup an ssl tunnel is also reported in the progress callback.
Always use serf_context_bucket_socket_create to create the socket_bucket.
This ensures that the traffic need to setup an ssl tunnel is also reported
in the progress callback.

* outgoing.c
  (prepare_conn_streams): Use serf_context_bucket_socket_create instead of
       serf_bucket_socket_create directly.

jandre/serf,jandre/serf,jandre/serf,jandre/serf