As per your suggestions we are migrating our server.xml from 1.5.4 to 1.5.7, however I am bit confused with it. If you could help me to convert it or give me a guide to use 1.5.7 server.xml it would be a great help.

I have attached the 1.5.4 server.xml file. 

Thank you.
Sudheer Kumar Arimbra