util.paths: Optimize path joining with few arguments A casual search suggests that the majority of paths.join() calls involve only two arguments. This saves the creation of a table for up to 3 arguments. Looks like 3x faster for 3 arguments or less, 5% slower when it uses the array to concatenate.

-- Only the operators needed by net.websocket.frames are provided at this point
return {
	band   = function (a, b) return a & b end;
	bor    = function (a, b) return a | b end;
	bxor   = function (a, b) return a ~ b end;
};