Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Add testing utility for behavior of atomic ops.

This small utility performs a sequence of atomic operations with random
parameters on an atomic variable. For every type, we also create 16
variables,

Add testing utility for behavior of atomic ops.

This small utility performs a sequence of atomic operations with random
parameters on an atomic variable. For every type, we also create 16
variables, to ensure that we test the correctness at different
alignments.

show more ...