update mallard2man.py from libbson
update mallard2man.py from libbson

Recent fixes:

* use ".B", not ".BR", in man pages
* escape backslashes in man pages
* CDRIVER-862 escape hyphens in man pages
* CDRIVER-863 whatis entries for all man pages

malexzx/mongo-c-driver,acmorrow/mongo-c-driver,mongodb/mongo-c-driver,bjori/mongo-c-driver,ac000/mongo-c-driver,remicollet/mongo-c-driver,acmorrow/mongo-c-driver,Machyne/mongo-c-driver,jmikola/mongo-c-driver,ksuarz/mongo-c-driver,rcsanchez97/mongo-c-driver,remicollet/mongo-c-driver,christopherjwang/mongo-c-driver,mschoenlaub/mongo-c-driver,acmorrow/mongo-c-driver,jmikola/mongo-c-driver,u2yg/mongo-c-driver,Convey-Compliance/mongo-c-driver,mongodb/mongo-c-driver,ajdavis/mongo-c-driver,Convey-Compliance/mongo-c-driver,bjori/mongo-c-driver,beingmeta/mongo-c-driver,beingmeta/mongo-c-driver,Convey-Compliance/mongo-c-driver,rcsanchez97/mongo-c-driver,ksuarz/mongo-c-driver,Machyne/mongo-c-driver,Convey-Compliance/mongo-c-driver,bjori/mongo-c-driver,rcsanchez97/mongo-c-driver,beingmeta/mongo-c-driver,bjori/mongo-c-driver,u2yg/mongo-c-driver,derickr/mongo-c-driver,ajdavis/mongo-c-driver,bjori/mongo-c-driver,malexzx/mongo-c-driver,derickr/mongo-c-driver,u2yg/mongo-c-driver,derickr/mongo-c-driver,jmikola/mongo-c-driver,rcsanchez97/mongo-c-driver,Machyne/mongo-c-driver,remicollet/mongo-c-driver,derickr/mongo-c-driver,mongodb/mongo-c-driver,christopherjwang/mongo-c-driver,christopherjwang/mongo-c-driver,rcsanchez97/mongo-c-driver,bjori/mongo-c-driver,remicollet/mongo-c-driver,Machyne/mongo-c-driver,acmorrow/mongo-c-driver,remicollet/mongo-c-driver,jmikola/mongo-c-driver,acmorrow/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,u2yg/mongo-c-driver,ajdavis/mongo-c-driver,jmikola/mongo-c-driver,derickr/mongo-c-driver,mschoenlaub/mongo-c-driver,remicollet/mongo-c-driver,ac000/mongo-c-driver,ajdavis/mongo-c-driver,malexzx/mongo-c-driver,acmorrow/mongo-c-driver,ksuarz/mongo-c-driver,ajdavis/mongo-c-driver,rcsanchez97/mongo-c-driver,mschoenlaub/mongo-c-driver,beingmeta/mongo-c-driver,mschoenlaub/mongo-c-driver,derickr/mongo-c-driver,beingmeta/mongo-c-driver,ajdavis/mongo-c-driver,acmorrow/mongo-c-driver,mongodb/mongo-c-driver,christopherjwang/mongo-c-driver,mongodb/mongo-c-driver,bjori/mongo-c-driver,beingmeta/mongo-c-driver,jmikola/mongo-c-driver,mongodb/mongo-c-driver,ksuarz/mongo-c-driver,rcsanchez97/mongo-c-driver,ajdavis/mongo-c-driver,beingmeta/mongo-c-driver,ac000/mongo-c-driver,malexzx/mongo-c-driver,mongodb/mongo-c-driver,Convey-Compliance/mongo-c-driver,derickr/mongo-c-driver,remicollet/mongo-c-driver