feat(ssl): redesign SSL usage

BREAKING CHANGE: Server::https was changed to allow any implementation
  of Ssl. Server in general was also changed. HttpConnector no longer
  uses SSL; using HttpsConnector instead.

src/http/message.rs

@@ -16,15 +16,12 @@ use url::Url;
 use method;
 use version;
 use traitobject;
-use net::ContextVerifier;
 
 /// The trait provides an API for creating new `HttpMessage`s depending on the underlying HTTP
 /// protocol.
 pub trait Protocol {
     /// Creates a fresh `HttpMessage` bound to the given host, based on the given protocol scheme.
     fn new_message(&self, host: &str, port: u16, scheme: &str) -> ::Result<Box<HttpMessage>>;
-    /// Sets the SSL verifier that should be used when establishing TLS-protected connections.
-    fn set_ssl_verifier(&mut self, verifier: ContextVerifier);
 }
 
 /// Describes a request.
@@ -63,7 +60,9 @@ pub trait HttpMessage: Write + Read + Send + Any + Typeable + Debug {
     /// After this, the `HttpMessage` instance can be used as an `io::Read` in order to read out
     /// the response body.
     fn get_incoming(&mut self) -> ::Result<ResponseHead>;
-
+    /// Set the read timeout duration for this message.
+    #[cfg(feature = "timeouts")]
+    fn set_read_timeout(&self, dur: Option<Duration>) -> ::Result<()>;
     /// Closes the underlying HTTP connection.
     fn close_connection(&mut self) -> ::Result<()>;
 }