Fixes to ssl/tls, misc improvements

* Use the PHP context options to configure tls rather than reinventing
  the wheel.
* Properly setup the SocketServer for ssl
* Added generic getter for config values

src/Http/Server.php

@@ -80,7 +80,7 @@ class Server
         $this->server->listen($socket);
         $this->logger->info(sprintf(
             "Listening on %s",
-            str_replace("tcp://",($socket instanceof SecureServer?"https://":"http://"),$socket->getAddress())
+            strtr($socket->getAddress(), [ "tcp://"=>"http://", "tls://"=>"https://"])
         ));
     }