History file format depends on configuration options

[eagle]

The current history file format on disk varies depending on whether INN was built on a 32-bit or 64-bit system, or was built with large file support or not. The on-disk file format should be standardized and dynamically updated if need be so that systems can move from 32-bit to 64-bit.

Attached is a patch from Marco d'Itri that was used for the Debian INN packages, which adds a 64-bit variant of the history backend. This isn't the best solution, but it's an interesting workaround.

[eagle]

his64v6 backend