Brief of ports of server.xml

Tomcat occupies 4 ports while running, if multi tomcat instances run on a same OS, the ports of each tomcat should be change to avoid port conflict. Here's brief of the 4 ports:

1. Port for shutdown：

<Server port="8005" shutdown="SHUTDOWN">

2. HTTP port：

<Connector port="8080" protocol="HTTP/1.1"

               connectionTimeout="20000"

               redirectPort="8443" />

The redirectPort should be same as AJP redirectPort.

3. AJP

<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />

The redirectPort should be same as HTTP redirectPort.