Investigate how to address the issue of gethostname potentially being invoked by bson_oid_init (when initializing a default context) before WSAStartup has been invoked by mongoc_init, as is required by the WinSock library on Windows (e.g. when using the bson library without mongoc).

This bug produces the following stderr message on Windows (e.g. by the C++ Driver's test_bson binary):

unable to get hostname: 0

Note: the value of 0 is due to printing errno instead of WSAGetLastError.