Is it stockfish or is it just me?
engines simply do not understand fortresses, this position is dead drawn.
give it a drawn r+p vs q+p fortress without a database, it will say like +5 when its a dead draw
From starting position, it is win for white.
I don't think it is. There is no place for the White king to break through.
Can you provide a winning line?
From starting position, it is win for white.
Looks like a draw to me and Stockfish 6 on my machine scores the starting position dead even at depth 45.
In this type of position, if there is no entry point for the king it is a draw. Your assessment was correct. As KirbyCake said an engine usually won't evaluate this type of drawn position correctly.
For some reason I don't have a version of the Crafty engine handy.
Crafty is usually good at this type of position (since it's makers got tired of ~2200 players stealing draws from it). I'd be curious how fast it finds the draw.