[reposted from my email as requested]

In trying to fix CXX-1001 and CXX-1100, I kept getting test failures implementing with the libmongoc cursor sent/is_alive functions. I wound up implementing what I needed on the mongocxx side to track "sent" and "alive" there and got it working.

The difference appears with command cursors. I don't have time to give an SSCCE (sorry) or narrow it down and our own tests are too sparse to be sure of that diagnosis, but it might be something to look into and I didn't want it lost.

(I.e. construct a cursor from a query and from something like list collections, then see if you get the same answers from sent/is_alive/current.)