By Alex Lauer L.L. Bean rarely offers sitewide discounts, and when we do see large sales, the brand’s unimpeachable Bean Boots are often excluded. So today is doubly exciting because the outdoor outfitter is offering 15% off sitewide when you use code COZY15 at checkout, including their quintessential leather-and-rubber stompers. We were made aware of the discount by Dappered, which doesn’t specify a length of time for the sale, and L.L. Bean itself doesn’t list the discount on its website. But we tried the code in our own cart and it worked, so if you want to take advantage of it, now’s the t…