B.3.3 bullets under wrong use cases

[allenwb]

The preface to B.3.3 lists three FiB use cases with bullets under each numbers use case. The bullets define when each use case applies. However the bullets for the second and third use cases each have the wrong bullet set. They need to be swapped.

The easiest (and I think best) fix is to leave the bullets where they are and swap the the numbered heading lines for cases 2 and 3.

(I think what happened is that I originally had only two use cases When the third was added i copied the send use case and updated the copied bullets. But then I changed the use case descript9ion line for the second set when I should have made that change for the third set).