Iran’s demands for reopening the Strait of Hormuz, as laid out in a statement Saturday, are largely what President Donald Trump had already agreed to do in the memorandum of understanding that was signed June 17 and quickly fell apart. But Iran sees control over the strait as its best chance of getting Trump to deliver on those promises — and is not willing to give it up just yet. (Pete Marovich/The New York Times) By STEVEN ERLANGER Iran’s demands for reopening the Strait of Hormuz, as laid…