Fix build on NetBSD 6.99.23.

* EXTRACT_USING=bsdtar for supressing warnings in extract stage.
* Add a patch to fix build on NetBSD 6.99.23, IP_PKTINFO related.

net/avahi/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.45 2013/06/17 12:44:54 wiz Exp $
+# $NetBSD: Makefile,v 1.46 2013/07/05 16:28:43 ryoon Exp $
 
 DISTNAME=		avahi-0.6.31
 PKGREVISION=		12
@@ -10,6 +10,8 @@ HOMEPAGE=		http://avahi.org/
 COMMENT=		Facilitate service discovery on a local network
 LICENSE=		gnu-lgpl-v2.1
 
+EXTRACT_USING=		bsdtar
+
 GNU_CONFIGURE=		YES
 USE_LIBTOOL=		YES
 USE_PKGINSTALL=		YES

net/avahi/distinfo

@@ -1,4 +1,4 @@
-$NetBSD: distinfo,v 1.12 2013/04/21 00:58:46 rodent Exp $
+$NetBSD: distinfo,v 1.13 2013/07/05 16:28:43 ryoon Exp $
 
 SHA1 (avahi-0.6.31.tar.gz) = 7e05bd78572c9088b03b1207a0ad5aba38490684
 RMD160 (avahi-0.6.31.tar.gz) = 122f553ee2d43cdd0185540a63a8e1f587bdb08e
@@ -7,3 +7,4 @@ SHA1 (patch-aa) = 95b883bf14dd1852cdf0ea8a364c57717eebb03f
 SHA1 (patch-ab) = e230ea9d57f40915469486faf4ffaf90ea3ebac3
 SHA1 (patch-ah) = 4b3ffdb927daef8c939527fd5c5893f9f88b3ff3
 SHA1 (patch-ai) = 48c5fca5683323a30dc646e5eafb1834e7bedaeb
+SHA1 (patch-avahi-core_socket.c) = 503f05f77d95b6f73d933810371c53242d13058c

net/avahi/patches/patch-avahi-core_socket.c

@@ -0,0 +1,19 @@
+$NetBSD: patch-avahi-core_socket.c,v 1.1 2013/07/05 16:28:43 ryoon Exp $
+
+* Fix build on NetBSD 6.99.23.
+  From martin@'s post on tech-pkg@.
+
+--- avahi-core/socket.c.orig	2011-04-25 00:12:18.000000000 +0000
++++ avahi-core/socket.c
+@@ -528,7 +528,11 @@ int avahi_send_dns_packet_ipv4(
+             pkti->ipi_ifindex = interface;
+ 
+         if (src_address)
++#ifdef __linux__
+             pkti->ipi_spec_dst.s_addr = src_address->address;
++#else
++            pkti->ipi_addr.s_addr = src_address->address;
++#endif
+     }
+ #elif defined(IP_MULTICAST_IF)
+     if (src_address) {