Addition of HTTPS support

[KasKatto]

New init overload that accepts a ssl context (OpenSSL::SSL::Context::Server class type). When the server is started it uses #bind_tls instead of #bind_tcp. HTTP can still be used, if you dont provide the ssl context.

Example:

ssl_context = OpenSSL::SSL::Context::Server.new
ssl_context.certificate_chain= "example.crt"
ssl_context.private_key= "example.key"

server = ActionController::Server.new(ssl_context, "0.0.0.0", 5000)

server.run()

[stakach]

Great idea!

[stakach]

I removed the not_nils