HTTPS access to the REST APIs

By default, access to the BMC Helix Discovery and BMC Discovery Outpost REST APIs is over HTTPS only and HTTP access is not permitted. An attempt to access any of the API endpoints (with the exception of /api/about and /api/version) over HTTP results in a 403 Forbidden error:

curl -i http://appliance/api/about

HTTP/1.1 403 Forbidden
{
  "message"   : "Access forbidden",
  "code"      : 403,
  "transient" : false
}