CDRIVER-2357 query secondaries with OP_MSG, part 3
CDRIVER-2357 query secondaries with OP_MSG, part 3

Injecting read preference primaryPreferred in "getMore" commands is ok.

beingmeta/mongo-c-driver,mongodb/mongo-c-driver,mongodb/mongo-c-driver,beingmeta/mongo-c-driver,mongodb/mongo-c-driver,derickr/mongo-c-driver,remicollet/mongo-c-driver,ajdavis/mongo-c-driver,rcsanchez97/mongo-c-driver,acmorrow/mongo-c-driver,acmorrow/mongo-c-driver,derickr/mongo-c-driver,rcsanchez97/mongo-c-driver,derickr/mongo-c-driver,remicollet/mongo-c-driver,ajdavis/mongo-c-driver,beingmeta/mongo-c-driver,rcsanchez97/mongo-c-driver,derickr/mongo-c-driver,beingmeta/mongo-c-driver,mongodb/mongo-c-driver,jmikola/mongo-c-driver,derickr/mongo-c-driver,remicollet/mongo-c-driver,rcsanchez97/mongo-c-driver,mongodb/mongo-c-driver,remicollet/mongo-c-driver,jmikola/mongo-c-driver,beingmeta/mongo-c-driver,ajdavis/mongo-c-driver,acmorrow/mongo-c-driver,derickr/mongo-c-driver,jmikola/mongo-c-driver,jmikola/mongo-c-driver,mongodb/mongo-c-driver,rcsanchez97/mongo-c-driver,ajdavis/mongo-c-driver,ajdavis/mongo-c-driver,acmorrow/mongo-c-driver,mongodb/mongo-c-driver,remicollet/mongo-c-driver,rcsanchez97/mongo-c-driver,beingmeta/mongo-c-driver,acmorrow/mongo-c-driver,jmikola/mongo-c-driver,acmorrow/mongo-c-driver,derickr/mongo-c-driver,ajdavis/mongo-c-driver,ajdavis/mongo-c-driver,rcsanchez97/mongo-c-driver,jmikola/mongo-c-driver,remicollet/mongo-c-driver,remicollet/mongo-c-driver,jmikola/mongo-c-driver,beingmeta/mongo-c-driver,acmorrow/mongo-c-driver,beingmeta/mongo-c-driver