Spawned process for scatter-gather point-to-point communication

This program is launched by a master process performing scatter-gather based point-to-point communication. It can be launched a number of times on each host. The program listens for incoming control messages from any process in a loop:

• if a control message has info[0] != 1 , then the program terminates
• if a control message has info[0] == 1 , then the process receives a chunk of a message from a sender process and forwards the message to a receiver process