The `struct date` members in `scoredat_t` add a dependency on <dos.h>
to the entire header file. Makes sense to move it out as early as
possible.
Part of P0133, funded by [Anonymous].
Which works in both Borland C++, Open Watcom, and Visual C++.
Not that we're about to port any of the games to these compilers, just
something I noticed while evaluating 32-bit compilers for ReC98's own
32-bit pipeline tools. Modders might want to look into that though,
since 100% position independence also makes it easier to change
compilers.
Necessary to make string literals from the first one end up at their
correct positions in the data segment even after the upcoming
deduplication…
Part of P0076, funded by [Anonymous] and -Tom-.
nmlgc