Create references.md

Author: GSri30

references.md

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+You can refer the following sites:
+https://www.geeksforgeeks.org/socket-programming-multi-threading-python/?ref=rp
+https://www.geeksforgeeks.org/socket-programming-in-cc-handling-multiple-clients-on-server-without-multi-threading/
+https://www.geeksforgeeks.org/socket-programming-python/
+https://www.geeksforgeeks.org/multithreading-python-set-1/
+https://youtu.be/Iu8_IpztiOU
+https://realpython.com/python-sockets/#running-the-multi-connection-client-and-server
+
+
+For timeout feature
+https://stackoverflow.com/questions/15195167/how-to-properly-use-timeout-parameter-in-select
+
+
+Other useful references
+https://stackoverflow.com/questions/230751/how-to-flush-output-of-print-function
+https://stackoverflow.com/questions/7127075/what-exactly-is-pythons-file-flush-doing