CS360 LAB Assignment #4
                    DUE and DEMO: 3-2-2023

The assignment is a simplified version of Project 13.17.1 of Chapter 13

Implement 2 sets of commands:

   ********** menu **********
   *  pwd   cd    ls    cp *   // executed by Server but displayed at Client
   * lpwd  lcd   lls   lcp *   // executed by Client locally
  **************************
		   
   cp file1 file2 : copy file1 from Server to file2 of Client
  lcp file1 file2 : copy file1 to file2 LOCALLY by Client
		   
YOUR server MUST be MULTI-threaded by processes

sample solution: ~samples/LAB4/server.bin
		              /client.bin