patch-bug1575876

--- media/mtransport/third_party/nICEr/src/stun/stun.h
+++ media/mtransport/third_party/nICEr/src/stun/stun.h
@@ -36,17 +36,17 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 
 #ifdef WIN32
 #include <winsock2.h>
 #else
 #include <sys/param.h>
 #include <sys/socket.h>
 #ifndef LINUX
 #include <net/if.h>
-#if !defined(__OpenBSD__) && !defined(__NetBSD__)
+#ifdef DARWIN
 #include <net/if_var.h>
 #endif
 #include <net/if_dl.h>
 #include <net/if_types.h>
 #else
 #include <linux/if.h>
 #endif
 #ifndef BSD