Print usage() if right before executing the specified command, it comes to be
that *argv is NULL (i.e. a flag was specified without a command being given).
function that prints when a botched guarded string operation occurs take
two const arguments.
XXX Should we use strlcat/strlcpy instead and hope for the best?
SUS wants (they want the entire suite of SCCS commands, we don't have them,
but we *had* the frontend, so we can have it again, and now).
Add $FreeBSD$ where appropriate, don't revive PSD.doc/spell.ok.
