Add an exit process to the exit chain.

Primarily this is for useage by the library. However, you could add things to the chain to ensure they are called when the program terminates. For example, you could close any open file handles by adding its Code Segment offset to the chain.

Processes in the chain are performed in the reverse order they are added. For example, the last process added will be the first one run at shutdown.

Removal of items from the chain is not supported at this time. They can only be added to the chain.

See also EXIT_CHAIN.