(Required for Phongo.)

A quick scan shows:

.h3 libbson

yajl stuff uses bare malloc/realloc/free

.h3 libmongoc

mongoc-sasl uses bare free and strdup

They need to not do that. It'd also be nice to have a way to enforce the requirement that we not call out (maybe scan object files for symbol dependencies on malloc, calloc, realloc,free?)