Logs don't report snapshot flag

(Reposting MONGOID-3873 as I've sent it empty and it immediately got closed)

I've been trying to force snapshot query using ModelName.limit(100).snapshot.each, but I'm not sure it's actually working. Logs don't mention anything about the added query option.

MOPED: 127.0.0.1:27017 QUERY        database=mpt_development collection=samples selector={"$query"=>{}, "$explain"=>true} flags=[] limit=-100 skip=0 batch_size=nil fields=nil runtime: 0.4430ms

It would be nice to at least confirm that moped sees the flag.