1. Instead of trying to cleanup the ugly ifdefs, we leave them alone so that
there are going to be fewer conflicts in the future.
2. Where we make changes to override things #ifdef __NetBSD__ around them
so that it is clear what we are changing. This is still missing in some
places, notably in opensslconf.h because it would make things messier.
alter des.h to be friendly with openssl/des.h (you can include both in the
same file)
make libkrb to depend on libdes. bump major.
massage various portioin of heimdal to be friendly with openssl 0.9.7b.
