`forking server`

The following is two servers that implement an "add service". A client sends a request to add two numbers, and the server returns the sum. The first server is iterative: it handles clients serially, one at a time. The second server forks a child process to service each new client, so that the server can handle multiple clients concurrently.

iterative.c: An iterative "add" server
forking.c: A forking "add" server
client.c: The "add" client
multi_client.c: Forks a specified number of clients which simultaneously make queries
mu.h: Utility header file
mu.c: Utility functions
Makefile: Makefile to build the iterative server, the forking server, and the client