Setting en passant square via Position::set doesn't work

[redbullmarky]

Given the following snippet of test code:

Position p;
Position::set("rnbqkbnr/ppppppp1/8/8/5NPp/8/PPPPPP1P/RNBQKB1R b KQkq g3 0 3", p);

When I output p.fen() it does not respond with the enpassant square & counters.
Looking into the surge code, the problem appears to be that Position::set doesn't deal with anything past the castling flags.

I've been using the library to validate moves in my own code, but not being able to set the enpassant means that it reports one less available move than should be possible.

[nkarve]

@redbullmarky Thanks for mentioning this. The whole Position::set function needs an overhaul, and I will update this very soon.