Add README for MySQL replay

Author: wangbin579

README

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+README.md

README.md

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+#A TCPCopy module for MySQL Replay
+
+mysql-replay-module is a TCPCopy module that can be used to replay MySQL sessions to support real testing of MySQL applications. 
+
+Please refer to [TCPCopy](https://github.com/session-replay-tools/tcpcopy) for more details before reading the following.
+
+##Installation
+
+###Getting intercept installed on the assistant server
+1. git clone git://github.com/session-replay-tools/intercept.git
+2. cd intercept
+3. ./configure --with-resp-payload
+4. make
+5. make install
+
+
+###Getting tcpcopy installed on the online server
+1. git clone git://github.com/session-replay-tools/tcpcopy.git
+2. cd tcpcopy
+3. git clone git://github.com/session-replay-tools/mysql-replay-module.git
+4. ./configure --set-protocol-module=mysql-replay-module
+5. make
+6. make install
+
+
+##Usage guide
+ 
+###1) On the target server which runs MySQL applications:
+      Set route command to route response packets to the assistant server
+
+        For example:
+
+           Assume 10.110.12.18 is the IP address of the assistant server and 
+        10.110.12.15 is the MySQL client IP address. We set the following route 
+        command to route all responses to the 10.110.12.15 to the assistant server.
+
+           route add -host 10.110.12.15 gw 10.110.12.18
+
+###2) On the assistant server which runs intercept(root privilege is required):
+   
+       ./intercept -F <filter> -i <device,> 
+	  
+       Note that the filter format is the same as the pcap filter.
+        
+       For example:
+
+          ./intercept -i eth0 -F 'tcp and src port 3306' -d
+
+          intercept will capture response packets of the TCP based application which 
+      listens on port 3306 from device eth0 
+    
+	
+###3) On the online source server (root privilege is required):
+      a) set user password pair in conf/plugin.conf in the installion directory
+
+        Format:
+           user user1@password1,user2@password2,...,userN@passwordN;
+
+        For example:
+           user root@123456;    
+        
+      b) start tcpcopy
+        ./tcpcopy -x localServerPort-targetServerIP:targetServerPort -s <intercept server,> 
+      
+        For example(assume 10.110.12.17 is the IP address of the target server):
+
+          ./tcpcopy -x 3306-10.110.12.17:3306 -s 10.110.12.18 
+
+          tcpcopy would capture MySQL packets(assume MySQL listens on 3306 port) on current 
+      server, do the necessary modifications and send these packets to the target port 
+      '3306' on '10.110.12.17'(the target MySQL), and connect 10.110.12.18 for asking 
+      intercept to pass response packets to it.
+
+##Note
+1. Both MySQL instances in the target server and online server must have the same user accounts and their privileges although passwords could be different
+2. Only the complete sesssion could be replayed
+
+
+##Release History
++ 2014.09  v1.0    mysql-replay-module released
+
+
+##Bugs and feature requests
+Have a bug or a feature request? [Please open a new issue](https://github.com/session-replay-tools/mysql-replay-module/issues). Before opening any issue, please search for existing issues.
+
+
+## Copyright and license
+
+Copyright 2014 under [the BSD license](LICENSE).
+
+