add features info in README file.

README.md

@@ -8,6 +8,26 @@ we can set up local listeners as proxy, and forward requests to internet via for
                 |Forwarder --> Forwarder->...| 
 ```
 
+## Features
+Listen(local proxy):
+- Socks5 proxy
+- Http proxy
+- SS proxy
+- Linux transparent proxy(iptables redirect)
+- TCP tunnel
+- DNS tunnel(udp2tcp)
+
+Forward(upstream proxy):
+- Socks5 proxy
+- Http proxy
+- SS proxy
+
+General:
+- Forward chain
+- HA or RR strategy for multiple forwarders
+- Http and socks5 on the same port
+- Periodical proxy checking
+
 ## Install
 Binary: 
 - [https://github.com/nadoo/glider/releases](https://github.com/nadoo/glider/releases)

glider.conf.example

@@ -50,7 +50,8 @@ listen=socks5://:1080
 # listen=tcptun://:1082=1.1.1.1:80
 
 # listen on udp port 53, act as a local dns server, 
-# forward all requests to 8.8.8.8:53 via tcp protocol,
+# forward all requests to 8.8.8.8:53 via tcp protocol
+# listen=dnstun://:53=8.8.8.8:53
 
 
 # FORWARDERS

rule.go

@@ -0,0 +1 @@
+package main

systemd/README.md

@@ -1,7 +1,11 @@
 ## Service
 
-service file:
+binary file:
+```bash
+cp glider /usr/bin/
+```
 
+service file:
 ```bash
 # copy service file to systemd
 cp systemd/glider@.service /etc/systemd/system/