Add "force encrypton" to config

[gigerIT]

Hi,
I would like to have the option to only accept and return encrypted requests on my API.
Now if a request does not have the "X-RESPONSE-ENCRYPTED" header the response is in plain text.
My approach would be to add an option for forcing it to the config file.

[tzsk]

@gigerIT Add/Create your own custom Middleware and Set whatever additional headers you want.

Make sure you apply the middleware before the Crypton middleware in the Chain.