While this localhost hardcoding would work fine if sgx-bwmsgsv2 was
run on its own, it usually isn't. Instead, it is run as a plugover
(see https://gitlab.com/ossguy/jmp-fwdcalls/commit/08d3acc for
details), and because the voice endpoint that jmp-fwdcalls responds to
is public (so our carrier can deliver voice-related requests directly
to it), we need the whole endpoint to be public, even though the
requests delivered to sgx-bwmsgsv2 don't require that.