Remove $FreeBSD$: one-line bare tagRemove /^\s*\$FreeBSD\$$\n/
Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
Remove $FreeBSD$: one-line .c patternRemove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/
Add simple tests which verify that redzone(9) works properly.