IPX/SPX upgrades overwrite *_tune.h files

An Upgrade installation to an SCO OpenServer Desktop System or Enterprise System does not automatically upgrade the files ipx_tune.h, nvt_tune.h, and spx_tune.h. Instead, during the installation, the files get saved to /usr/lib/ipxrt/saved_config. If you have made changes to these files that you want to preserve, compare them with the newly-installed versions after the upgrade, and make any necessary changes to the new files.