Small changes to Readme around Consul description (#8114)

Re-ordered features and revised Consul description.
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* Tutorials: [https://learn.hashicorp.com](https://learn.hashicorp.com/consul)
* Forum: [Discuss](https://discuss.hashicorp.com/c/consul)
Consul is a tool for service discovery and configuration. Consul is
distributed, highly available, and extremely scalable.
Consul is a distributed, highly available, and data center aware solution to connect and configure applications across dynamic, distributed infrastructure.
Consul provides several key features:
* **Multi-Datacenter** - Consul is built to be datacenter aware, and can
support any number of regions without complex configuration.
* **Service Mesh/Service Segmentation** - Consul Connect enables secure service-to-service
communication with automatic TLS encryption and identity-based authorization. Applications
can use sidecar proxies in a service mesh configuration to establish TLS
connections for inbound and outbound connections without being aware of Connect at all.
* **Service Discovery** - Consul makes it simple for services to register
themselves and to discover other services via a DNS or HTTP interface.
External services such as SaaS providers can be registered as well.
@ -18,18 +25,10 @@ Consul provides several key features:
discovery prevents routing traffic to unhealthy hosts and enables service
level circuit breakers.
* **Service Segmentation/Service Mesh** - Consul Connect enables secure service-to-service
communication with automatic TLS encryption and identity-based authorization. Applications
can use sidecar proxies in a service mesh configuration to establish TLS
connections for inbound and outbound connections without being aware of Connect at all.
* **Key/Value Storage** - A flexible key/value store enables storing
dynamic configuration, feature flagging, coordination, leader election and
more. The simple HTTP API makes it easy to use anywhere.
* **Multi-Datacenter** - Consul is built to be datacenter aware, and can
support any number of regions without complex configuration.
Consul runs on Linux, Mac OS X, FreeBSD, Solaris, and Windows. A commercial
version called [Consul Enterprise](https://www.hashicorp.com/products/consul)
is also available.