iproute2: restore two mistakenly deleted patches

Commit 3d5e4758 pruned a little too deeply.

sdk_container/src/third_party/coreos-overlay/sys-apps/iproute2/files/iproute2-3.1.0-mtu.patch

@@ -0,0 +1,48 @@
+http://bugs.gentoo.org/291907
+
+This patch was merged from two patches extracted from this thread:
+http://markmail.org/thread/qkd76gpdgefpjlfn
+
+tc_stab.c: small fixes to commandline help
+
+
+tc_core.c:
+As kernel part of things relies on cell align which is always set to -1,
+I also added it to userspace computation stage. This way if someone
+specified e.g. 2048 and 512 for mtu and tsize respectively, one wouldn't
+end with tsize supporting mtu 4096 suddenly, New default mtu is also set
+to 2048 (disregarding weirdness of setting mtu to such values).
+
+
+Unless I missed something, this is harmless and feels cleaner, but if it's
+not allowed, documentation will have to be changed back to 2047 + extra
+explanation as well.
+
+--- iproute2/tc/tc_core.c
++++ iproute2/tc/tc_core.c
+@@ -155,12 +155,12 @@
+ 	}
+ 
+ 	if (s->mtu == 0)
+-		s->mtu = 2047;
++		s->mtu = 2048;
+ 	if (s->tsize == 0)
+ 		s->tsize = 512;
+ 
+ 	s->cell_log = 0;
+-	while ((s->mtu >> s->cell_log) > s->tsize - 1)
++	while ((s->mtu - 1 >> s->cell_log) > s->tsize - 1)
+ 		s->cell_log++;
+ 
+ 	*stab = malloc(s->tsize * sizeof(__u16));
+--- iproute2/tc/tc_stab.c
++++ iproute2/tc/tc_stab.c
+@@ -32,7 +32,7 @@
+ 	fprintf(stderr,
+ 		"Usage: ... stab [ mtu BYTES ] [ tsize SLOTS ] [ mpu BYTES ] \n"
+ 		"                [ overhead BYTES ] [ linklayer TYPE ] ...\n"
+-		"   mtu       : max packet size we create rate map for {2047}\n"
++		"   mtu       : max packet size we create size table for {2048}\n"
+ 		"   tsize     : how many slots should size table have {512}\n"
+ 		"   mpu       : minimum packet size used in rate computations\n"
+ 		"   overhead  : per-packet size overhead used in rate computations\n"

sdk_container/src/third_party/coreos-overlay/sys-apps/iproute2/files/iproute2-3.1.0-no-ipv6.patch

@@ -0,0 +1,41 @@
+https://bugs.gentoo.org/326849
+
+allow ipv6 to be disabled
+
+--- a/ip/iptunnel.c
++++ b/ip/iptunnel.c
+@@ -456,13 +456,6 @@ int do_iptunnel(int argc, char **argv)
+ 		break;
+ 	case AF_INET:
+ 		break;
+-	/*
+-	 * This is silly enough but we have no easy way to make it
+-	 * protocol-independent because of unarranged structure between
+-	 * IPv4 and IPv6.
+-	 */
+-	case AF_INET6:
+-		return do_ip6tunnel(argc, argv);
+ 	default:
+ 		fprintf(stderr, "Unsupported family:%d\n", preferred_family);
+ 		exit(-1);
+--- a/ip/Makefile
++++ b/ip/Makefile
+@@ -1,6 +1,6 @@
+ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \
+-    rtm_map.o iptunnel.o ip6tunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
+-    ipmaddr.o ipmonitor.o ipmroute.o ipprefix.o iptuntap.o \
++    rtm_map.o iptunnel.o tunnel.o ipneigh.o ipntable.o iplink.o \
++    ipmaddr.o ipmonitor.o ipmroute.o iptuntap.o \
+     ipxfrm.o xfrm_state.o xfrm_policy.o xfrm_monitor.o \
+     iplink_vlan.o link_veth.o link_gre.o iplink_can.o \
+     iplink_macvlan.o iplink_macvtap.o ipl2tp.o
+--- a/ip/ipmonitor.c
++++ b/ip/ipmonitor.c
+@@ -76,7 +76,6 @@ int accept_msg(const struct sockaddr_nl *who,
+ 	if (n->nlmsg_type == RTM_NEWPREFIX) {
+ 		if (prefix_banner)
+ 			fprintf(fp, "[PREFIX]");
+-		print_prefix(who, n, arg);
+ 		return 0;
+ 	}
+ 	if (n->nlmsg_type == RTM_NEWRULE || n->nlmsg_type == RTM_DELRULE) {