doc: update double concerns.
doc: update double concerns.

jqk6/libbson,remicollet/libbson,mapr/libbson,remicollet/libbson,Convey-Compliance/libbson,jqk6/libbson,paulmelnikow/libbson,hanumantmk/libbson,mapr/libbson,jqk6/libbson,ksuarz/libbson,mongodbinc-interns/libbson,bjori/libbson,mongodb/libbson,4Second2None/libbson_tmp,alexeyvo/libbson,derickr/libbson,ksuarz/libbson,4Second2None/libbson_tmp,4Second2None/libbson_tmp,derickr/libbson,mongodb/libbson,rayyang2000/libbson,Machyne/libbson,jqk6/libbson,remicollet/libbson,mongodbinc-interns/libbson,paulmelnikow/libbson,hanumantmk/libbson,bjori/libbson,Machyne/libbson,derickr/libbson,rcsanchez97/libbson,hanumantmk/libbson,alexeyvo/libbson,mongodbinc-interns/libbson,bjori/libbson,Convey-Compliance/libbson,ajdavis/libbson,rayyang2000/libbson,mapr/libbson,mongodbinc-interns/libbson,rayyang2000/libbson,hanumantmk/libbson,mongodb/libbson,rcsanchez97/libbson,rayyang2000/libbson,Machyne/libbson,derickr/libbson,ajdavis/libbson,paulmelnikow/libbson,remicollet/libbson,paulmelnikow/libbson,ajdavis/libbson,Convey-Compliance/libbson,alexeyvo/libbson,paulmelnikow/libbson,4Second2None/libbson_tmp,rcsanchez97/libbson,Machyne/libbson,ksuarz/libbson