Support for https in sc-server

[davidwkeith]

Allow a self-signed cert hosting of https://localhost:4443 (or whatever) so development can be done against back ends which set the secure bit on cookies without setting up an additional proxy server.

For example:

https://example.com/session sets a secure session cookie

Code at http://localhost:4020 can't see it even if the following config it used:

proxy '/session', :to => 'https://example.com', :https => true