Close pipe file on unload of map?

[tckarenchiang]

In the spirit of properly managing resources, it might be nice to use that function to make sure the pipe file is properly closed. We cannot assume the user has called the necessary console commands to do that for us.

A check should of course be included to see whether the file is still open, and only attempt to close it if necessary.

It might be also good to think about other cleanup operations which could be performed by deleteMap(..)
Relevant thread: https://forum.giants-software.com/viewtopic.php?t=102709