Demonstration of TCP/IP client/server code

echoclient.c
echoclient.pl
	Basic echo client

echoclientub.c
	Echo client with partial buffering to demonstrate granularity
	of concurrency

echoserveri.c
echoserverimin.c
echoserveri.pl
	Sequential server.

echoserverp.c
	Echo server that forks separate process for each client

echoservert.c
	Echo server that spawns a separate thread for each client

echoservers.c
	Echo server and client using I/O multiplexing