library(http/http_client) with https URLs

Is it possible to use http_get/3 and http_post/4 with https URLs?  I've
used them successfully with http URLs, but attempts with https produce
results like these:

1 ?- use_module(library(http/http_client)).
true.
2 ?- use_module(library(http/http_ssl_plugin)).
true.
3 ?- http_get('https://encrypted.google.com', Reply, []).
false.
4 ?- http_get('https://encrypted.google.com:443', Reply, []).
ERROR: Unknown error term: syntax(http_reply_header,end_of_file)

I'm able to make GET requests using http_open/3 but would really like to
use http_client's pleasant interface.

I thought I'd seen discussion about this on the mailing list before, but
can't seem to find it now.  This is SWI-Prolog version 6.3.19 on OS X 10.8.4

Thanks.

-- 
Michael
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