Update stunnel directions link

The instructions for using Redis command line tools pointed to a preview release blog post and now there is updated / official documentation with similar directions.

Author: Kevin Hakanson

articles/azure-cache-for-redis/cache-faq.md

@@ -247,7 +247,7 @@ You can use any of the commands listed at [Redis commands](https://redis.io/comm
 * `redis-cli -h <Azure Cache for Redis name>.redis.cache.windows.net -a <key>`
 
 > [!NOTE]
-> The Redis command-line tools do not work with the SSL port, but you can use a utility such as `stunnel` to securely connect the tools to the SSL port by following the directions in the [Announcing ASP.NET Session State Provider for Redis Preview Release](https://blogs.msdn.com/b/webdev/archive/2014/05/12/announcing-asp-net-session-state-provider-for-redis-preview-release.aspx) blog post.
+> The Redis command-line tools do not work with the SSL port, but you can use a utility such as `stunnel` to securely connect the tools to the SSL port by following the directions in the [How to use the Redis command-line tool with Azure Cache for Redis](https://docs.microsoft.com/en-us/azure/azure-cache-for-redis/cache-how-to-redis-cli-tool) article.
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