gopsutil/load
Steven Hartland 6450c60b61 Eliminate use of sysctl command on FreeBSD
In order to improve performance and help prevent crashes due to the outstanding fork crash bug:
https://github.com/golang/go/issues/15658

Replace string parsed values from the sysctl command with native reads of sysctl values using unix.SysctlRaw and unix.SysctlUint32.

This also merges OpenBSD and FreeBSD load implementations which are identical.
..
load.go
load_bsd.go Eliminate use of sysctl command on FreeBSD
load_darwin.go
load_fallback.go Add support for OpenBSD/amd64
load_linux.go
load_test.go [load] freebsd: change to use x/sys/unix.SysctlRaw.
load_windows.go