PROJECT DEFINITION : Server-multiple client chat model
      Server allowes multiple client to connect and let the clients chat themselves.

List of programs : 
1> mserver.c
      Describes the server side of the model which handles multiple clients, 
      detects input nick errors and sends message to the relevant client described 
      by the sender and also displays the list of clients every time a new client 
      enters the server.

2> client.c
      Describes the client side of the model and sends messages to a specified user.

programms compilation:
      1.mserver.c
        gcc -lpthread -o mserver mserver.c

      2.client.c
        gcc -lpthread -o client client.c