- Add <sys/param.h> and <limits.h> where required (do not depend on other
headers pulling it in).
- __dead -> __dead2
- #if defined() -> #ifdef
- Remove ugly PRIu64 macros and use %llu w/ (unsigned long long) cast.
All changes looped back to OpenBSD (where applicable) for easier sync in the
future.
Requested by: bde
Approved by: bms(mentor)