Requested Crop command line option

[Pok]

Currently there is the command line option

/crop=(x,y,w,h)

where x, y, w and h accept numeric values.

It would really help if it also accepted values expressed as %... eg:

/crop=(10%,10%,50%,50%)

or

/crop=(0,0,50%,100%)

(would cut the picture in half)