refactor server_replication.php
1. render HTML at once
2. split long functions
Merge branch 'master' of https://github.com/phpmyadmin/phpmyadmin into 0616_server_replication
1. fix the undefine error
2. add function to render same html tags
1. change the function name
2. fix Div function
3. using $_REQUEST when the variable is in the request list
Merge pull request #435 from xmujay/0616_server_replication

refactor server_replication.php 1. render HTML at once 2. split long functions