SYNOPSIS
	int valid_trace(string what)

DESCRIPTION
	Check if the interactive user is allowed to use tracing.

	The argument <what> denotes the action for which permission is to be
	checked:

	"trace"		Is the user allowed to use tracing?
	"traceprefix"   Is the user allowed to set a traceprefix?

SEE ALSO
	trace(E), showsmallnewmalloced(D), malloc(D), status(D), memory(C)
