[Update] DNS Manager (#2379)

* [Update] DNS Manager

Update guide to make mention of CloudFlare and the benefits it provides customers.

* Vale Fix

Added `cloudflare` to Vale dictionary, changed capitalization of Cloudflare.

* Refactored guide and tech edit

* Review edits

* Spiced up Cloudflare benefits note

* Also update Cloudflare note in classic guide

Author: andystevensname

ci/vale/dictionary.txt

@@ -157,6 +157,7 @@ clickjacking
 client1
 client2
 clojure
+cloudflare
 cloudnet
 clozure
 cls

docs/platform/manager/dns-manager-classic-manager/index.md

@@ -18,6 +18,10 @@ hiddenguide: true
 
 The *DNS Manager* is a comprehensive DNS management interface available within the Linode Manager that allows you to add DNS records for all of your domain names. This guide covers the use of Linode's DNS Manager and basic domain zone setup. For an introduction to DNS in general, see our [Introduction to DNS Records](/docs/networking/dns/dns-records-an-introduction/) guide.
 
+{{< note >}}
+Linode's DNS service employs [Cloudflare](https://cloudflare.com) to provide denial of service (DDoS) mitigation, load balancing, and increased geographic distribution for our [name servers](/docs/networking/dns/dns-records-an-introduction/#name-servers). These factors make our service reliable, fast, and a great choice for your DNS needs.
+{{</ note>}}
+
 ## Getting Started
 
 The Domain Name System (DNS) attaches human-readable domain names to machine-usable IP addresses. In many ways, it is the phone book of the Internet. Just like a phone book can help you find the phone number of a business, DNS can take a domain name like `google.com` and translate it into an IP address like `74.125.19.147`. This global system allows users to remember the names of websites instead of their numeric IP addresses.