case insensitive header for rate limits, fix rate limit default settings

Also disabled rate limit bypass right as it doesn't work...

src/util/config/types/subconfigurations/limits/RateLimits.ts

@@ -14,5 +14,5 @@ export class RateLimits {
 		count: 10,
 		window: 5
 	};
-	routes: RouteRateLimit;
+	routes: RouteRateLimit = new RouteRateLimit();
 }

src/util/config/types/subconfigurations/limits/ratelimits/Route.ts

@@ -14,6 +14,6 @@ export class RouteRateLimit {
 		count: 10,
 		window: 5
 	};
-	auth: AuthRateLimit;
+	auth: AuthRateLimit = new AuthRateLimit();
 	// TODO: rate limit configuration for all routes
 }