Create tor-fw-helper.c
tor-fw-helper.c should support upnp and nat-pmp; it should be written in such a way that output from tor-fw-helper.c will be machine parsed without too much trouble.
tor-fw-helper.c should support upnp and nat-pmp; it should be written in such a way that output from tor-fw-helper.c will be machine parsed without too much trouble.