Mweb 983

@nandy-andy @rogatty Guys, this is a script mostly written by Rafał - please code review it and we could test it when it reaches QA column. Adding @aquilax here if he doesn't mind taking a look :) :8ball: :snowman: :bird:
Eh, I recall it's faster than `parseInt()` but it looks weird as you want to concatenate `undefined` with `args[0]`... Will it be so pain to use `parseInt()`? ;) It's a maintenance script I'm wondering if we have to think so hard about performance in this case.