optional keyword with for sortarray()

[blueznl]

very useful: multiple arrays sorted at once:

sortarray() normally sorts one array

sortarray(x1()) with x2(), x3(), x4() would sort the arrays x2() x3() and x4() based on the sequence in x1()

alternative syntax:

multisort(x1(),,,x2(),x3(),x4())

or something along those lines...