Not all of these strictly need to be bumped to 0.2.0; many could go
to 0.1.1 instead. But since everything at the tor-rtcompat and
higher layers has had breaking API changes, it seems not so useful
to distinguish. (It seems unlikely that anybody at this stage is
depending on e.g. tor-protover but not arti-client.)
Add tls_conn field to ArtiHttpConnector (and argument to constructor).
Introduce MaybeHttpsStream and use it in ArtiHttpConnection.
Have the example program pass the native TLS connector.
Currently the TLS connector and the HTTPS variant are not used, but
this commit is very noisy and fomrulaic, so I have split out the code
to use them into a separate commit for easier preparation and review.
Nick Mathewson
Ian Jackson