This is the network driver which is used for MSVPC 2007. I spotted it during a WIP-backport-experiment of the driver, when compiling with GCC4.7.2, which warned about it. GCC8.4.0 unfortunately is blind to that on master head, for unknown reasons. Not good. MSVC github buildbot is also blind to that on master head, for unknown reasons. Not good. We later found that at least Clang did also warn about it on master head.