context: use statically allocated default context.
context: use statically allocated default context.

This removes the need for the atexit() handler.

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