update readme and changelog

changelog.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [6.8.0](https://github.com/express-rate-limit/express-rate-limit/releases/tag/v6.8.0)
+
+### Changed
+
+- Added a set of validation checks to execute on the first request. (See
+  [#358](https://github.com/express-rate-limit/express-rate-limit/issues/358))
+
 ## [6.7.1](https://github.com/express-rate-limit/express-rate-limit/releases/tag/v6.7.1)
 
 ### Fixed

readme.md

@@ -451,6 +451,21 @@ const limiter = rateLimit({
 })
 ```
 
+### `validation`
+
+> `boolean`
+
+When enabled, a set of validation checks are run on the first request to detect
+common misconfigurations with proxies, etc. Prints an error to the console if
+any issue is detected.
+
+Automatically disables after the first request is processed.
+
+See https://github.com/express-rate-limit/express-rate-limit/wiki/Error-Codes
+for more info.
+
+Defaults to true.
+
 ### `store`
 
 > `Store`

source/lib.ts

@@ -206,7 +206,7 @@ const parseOptions = (
 			_response: Response,
 			_optionsUsed: Options,
 		): void {},
-		// Set the default action to be printing a warning in the console.
+		// Will print an error to the console if a few known misconfigurations are detected.
 		validation: true,
 		// Allow the options object to be overriden by the options passed to the middleware.
 		...notUndefinedOptions,