add http server root password protection (#757)

- Feature: Added `--security-config-path` option to zenserver to configure security settings
  - Expects a path to a .json file
  - Default is an empty path resulting in no extra security settings and legacy behavior
  - Current support is a top level filter of incoming http requests restricted to the `password` type
  - `password` type will check the `Authorization` header and match it to the selected authorization strategy
  - Currently the security settings is very basic and configured to a fixed username+password at startup

        {
            "http" {
                "root": {
                    "filter": {
                        "type": "password",
                        "config": {
	                          "password": {
	                              "username": "<username>",
	                              "password": "<password>"
	                          },
                            "protect-machine-local-requests": false,
	                          "unprotected-uris": [
	                              "/health/",
	                              "/health/info",
	                              "/health/version"
	                          ]
                        }
                    }
                }
            }
        }

1 files changed, 7 insertions, 1 deletions

diff --git a/src/zenserver/zenserver.h b/src/zenserver/zenserver.h
index ab7122fcc..efa46f361 100644
--- a/src/zenserver/zenserver.h
+++ b/src/zenserver/zenserver.h
@@ -72,7 +72,10 @@ protected:
 	std::function<void()> m_IsReadyFunc;
 	void				  OnReady();
 
-	Ref<HttpServer>	  m_Http;
+	Ref<HttpServer> m_Http;
+
+	std::unique_ptr<IHttpRequestFilter> m_HttpRequestFilter;
+
 	HttpHealthService m_HealthService;
 	HttpStatusService m_StatusService;
 
@@ -107,6 +110,9 @@ protected:
 
 	// IHttpStatusProvider
 	virtual void HandleStatusRequest(HttpServerRequest& Request) override;
+
+private:
+	void InitializeSecuritySettings(const ZenServerConfig& ServerOptions);
 };
 
 class ZenServerMain