Text this: Hydrogen‐bonding interactions in the salts 2,4,6‐triaminopyrimidin‐1‐ium sorbate dihydrate, 2,4,6‐triaminopyrimidin‐1‐ium N‐phenylantharanilate and 2,4,6‐triaminopyrimidin‐1‐ium p‐toluenesulfonate