Add configuration options for twitch mirror

install/config.example.yml

@@ -56,4 +56,8 @@ chat:
     enabled: false
     username:
     #https://twitchapps.com/tmi/
-    password:
+    password:
+
+twitch_mirror:
+# enable to allow users to mirror video streams to twitch
+  enabled: false

src/config.ts

@@ -81,6 +81,9 @@ const config: Object = {
 			username: null,
 			token: null
 		}, localconfig['chat']['twitch'])
-	}
+	},
+	twitch_mirror: Object.assign({
+		enabled: false
+	}, localconfig['twitch_mirror'])
 };
 export { config };