slightly refine readme

README.md

@@ -12,7 +12,7 @@
 
 ## What is Easegress
 
-`Easegress` (formerly known as `EaseGateway`)is an all-rounder gateway system, which is designed:
+`Easegress` (formerly known as `EaseGateway`)is an all-rounder traffic orchestration system, which is designed for:
 
 - **High Availability:** Built-in Raft consensus & leader election makes 99.99% availability.
 - **Traffic Orchestration:** Dynamically orchestrating various filters to a traffic pipeline.
@@ -48,9 +48,9 @@ The architecture of Easegress:
  - **Security**
   - **IP Filter:** Limits access to IP addresses.
   - **Static HTTPS:** static certificate files.
-  - **API Signature:** supports **HMAC** verification.
+  - **API Signature:** supports [HMAC](https://en.wikipedia.org/wiki/HMAC) verification.
   - **JWT Verification:** verifies [JWT Token](https://jwt.io/).
-  - **OAuth2:** validates OAuth2 requests.
+  - **OAuth2:** validates [OAuth/2](https://datatracker.ietf.org/doc/html/rfc6749) requests.
   - **Let's Encrypt:** automatically manage certificate files.
  - **Pipeline-Filter Mechanism**
   - **Chain of Responsibility Pattern:** orchestrates filters chain.
@@ -64,13 +64,13 @@ The architecture of Easegress:
   - **Service Discovery** integrates with Eureka, Consul, Etcd, and Zookeeper.
 - **High Performance and Availability**
  - **Adaption**: adapts request, response in the handling chain.
- - **Validation**: headers validation, Oauth2, JWT, and HMAC verifying.
+ - **Validation**: headers validation, OAuth2, JWT, and HMAC verification.
  - **Load Balance:** round-robin, random, weighted random, ip hash, header hash.
  - **Cache:** for the backend servers.
  - **Compression:** compresses body for the response.
  - **Hot-Update:** updates both config and binary of Easegress in place without losing connections.
 - **Operation**
- - **Easy to Integrate:** command line(egctl), MegaEase Portal, HTTP clients such as curl, postman, etc.
+ - **Easy to Integrate:** command line(`egctl`), MegaEase Portal, HTTP clients such as curl, postman, etc.
  - **Distributed Tracing**
   - Built-in [Open Zipkin](https://zipkin.io/)
   - [Open Tracing](https://opentracing.io/) for vendor-neutral APIs