Do not issue an SIOCSIFNETMASK before SIOCSIFADDR it is not
needed even if the XXX says otherwise.

pending https://github.com/ofalk/libdnet/pull/92

Index: src/intf.c
--- src/intf.c.orig
+++ src/intf.c
@@ -69,7 +69,13 @@
 /* XXX - superset of ifreq, for portable SIOC{A,D}IFADDR */
 struct dnet_ifaliasreq {
 	char		ifra_name[IFNAMSIZ];
-	struct sockaddr ifra_addr;
+	union {
+		struct sockaddr ifrau_addr;
+		int		ifrau_align;
+		} ifra_ifrau;
+#ifndef ifra_addr
+#define ifra_addr	ifra_ifrau.ifrau_addr
+#endif
 	struct sockaddr ifra_brdaddr;
 	struct sockaddr ifra_mask;
 	int		ifra_cookie;	/* XXX - IRIX!@#$ */
@@ -303,7 +309,7 @@ intf_set(intf_t *intf, const struct intf_entry *entry)
 	}
 	/* Set interface address. */
 	if (entry->intf_addr.addr_type == ADDR_TYPE_IP) {
-#ifdef BSD
+#if defined(BSD) && !defined(__OpenBSD__)
 		/* XXX - why must this happen before SIOCSIFADDR? */
 		if (addr_btos(entry->intf_addr.addr_bits,
 		    &ifr.ifr_addr) == 0) {