Added HttpsConnector::new function

[MarkusTieger]

As you can see here ,

HttpsConnector implements

From<(H, C)>  for HttpsConnector<H>
where
    C: Into<Arc<rustls::ClientConfig>>

which just sets the server_name_resolver to DefaultServerNameResolver.

This adds

impl<H, C> From<(H, C, Arc<dyn ResolveServerName + Send + Sync>)> for HttpsConnector<H>
where
    C: Into<Arc<rustls::ClientConfig>>

which does the same, but can be used to specify another server_name_resolver.