peter 76162281a2 Add NetBSD/OpenBSD compatable timeradd()/timersub() user-space macros.
These are deliberately not visible to the kernel since we have timevaladd()
and timevalsub() functions there.

Obtained from: NetBSD/OpenBSD
1996-12-30 15:36:56 +00:00
..
1996-11-11 14:18:40 +00:00
1996-06-14 11:02:28 +00:00