This is correctness rather than performance, but found while investigating
performance.
Bug: 18593728
Change-Id: Idbdfed89d1931fcfae65db29d662108d4bbd9b65
Also undo some of the mess where we have OpenBSD <stdio.h> but a mix of
different BSD's implementations.
In this first pass, I've only moved easy OpenBSD stuff.
Change-Id: Iae67b02cde6dba9d8d06fedeb53efbfdac0a8cf6