Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r228681:

In usr.sbin/sa/db.c, avoid warnings about assigning two const char
arrays to non-const void pointers, by casting away const explicitly.

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Ensure that the -s flag truncates the accounting data.

This problem has only been reported on the amd64 platform.

PR: bin/120293
Tested by: Callum Gibson
MFC after: 2 weeks

Fix a compiler warning by using a printf format matching the variable
type.

Increase precision of time values in the process accounting
structure, while maintaining backward compatibility with legacy
file and record formats.