sys-freebsd/freebsd-sources: remove unused patch.

Closes: https://github.com/gentoo/gentoo/pull/7011

sys-freebsd/freebsd-sources/files/freebsd-sources-9.0-ipv6refcount.patch

@@ -1,128 +0,0 @@
-Index: sys/netinet6/in6.c
-===================================================================
---- sys/netinet6/in6.c.orig
-+++ sys/netinet6/in6.c
-@@ -1369,6 +1369,8 @@ in6_purgeaddr(struct ifaddr *ifa)
- 	}
- 
- cleanup:
-+	if (ifa0 != NULL)
-+		ifa_free(ifa0);
- 
- 	plen = in6_mask2len(&ia->ia_prefixmask.sin6_addr, NULL); /* XXX */
- 	if ((ia->ia_flags & IFA_ROUTE) && plen == 128) {
-@@ -1393,8 +1395,6 @@ cleanup:
- 			return;
- 		ia->ia_flags &= ~IFA_ROUTE;
- 	}
--	if (ifa0 != NULL)
--		ifa_free(ifa0);
- 
- 	in6_unlink_ifa(ia, ifp);
- }
-@@ -1667,14 +1667,19 @@ in6_lifaddr_ioctl(struct socket *so, u_long cmd, c
- 			hostid = IFA_IN6(ifa);
- 
- 			/* prefixlen must be <= 64. */
--			if (64 < iflr->prefixlen)
-+			if (64 < iflr->prefixlen) {
-+				if (ifa != NULL)
-+					ifa_free(ifa);
- 				return EINVAL;
-+			}
- 			prefixlen = iflr->prefixlen;
- 
- 			/* hostid part must be zero. */
- 			sin6 = (struct sockaddr_in6 *)&iflr->addr;
- 			if (sin6->sin6_addr.s6_addr32[2] != 0 ||
- 			    sin6->sin6_addr.s6_addr32[3] != 0) {
-+				if (ifa != NULL)
-+					ifa_free(ifa);
- 				return EINVAL;
- 			}
- 		} else
-@@ -2265,14 +2265,20 @@ in6_ifawithifp(struct ifnet *ifp, struct in6_addr
- 		IN6_IFADDR_RUNLOCK();
- 		return (struct in6_ifaddr *)ifa;
- 	}
--	IN6_IFADDR_RUNLOCK();
- 
- 	/* use the last-resort values, that are, deprecated addresses */
--	if (dep[0])
-+	if (dep[0]) {
-+		ifa_ref((struct ifaddr *)dep[0]);
-+		IN6_IFADDR_RUNLOCK();
- 		return dep[0];
--	if (dep[1])
-+	}
-+	if (dep[1]) {
-+		ifa_ref((struct ifaddr *)dep[1]);
-+		IN6_IFADDR_RUNLOCK();
- 		return dep[1];
-+	}
- 
-+	IN6_IFADDR_RUNLOCK();
- 	return NULL;
- }
- 
-Index: sys/netinet6/ip6_input.c
-===================================================================
---- sys/netinet6/ip6_input.c.orig
-+++ sys/netinet6/ip6_input.c
-@@ -879,19 +879,23 @@ passin:
- 	 * as our interface address (e.g. multicast addresses, addresses
- 	 * within FAITH prefixes and such).
- 	 */
--	if (deliverifp && !ip6_getdstifaddr(m)) {
-+	if (deliverifp) {
- 		struct in6_ifaddr *ia6;
- 
--		ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
--		if (ia6) {
--			if (!ip6_setdstifaddr(m, ia6)) {
--				/*
--				 * XXX maybe we should drop the packet here,
--				 * as we could not provide enough information
--				 * to the upper layers.
--				 */
-+ 		if ((ia6 = ip6_getdstifaddr(m)) != NULL) {
-+			ifa_free(&ia6->ia_ifa);
-+		} else {
-+			ia6 = in6_ifawithifp(deliverifp, &ip6->ip6_dst);
-+			if (ia6) {
-+				if (!ip6_setdstifaddr(m, ia6)) {
-+					/*
-+					 * XXX maybe we should drop the packet here,
-+					 * as we could not provide enough information
-+					 * to the upper layers.
-+					 */
-+				}
-+				ifa_free(&ia6->ia_ifa);
- 			}
--			ifa_free(&ia6->ia_ifa);
- 		}
- 	}
- 
-Index: sys/netinet/tcp_input.c
-===================================================================
---- sys/netinet/tcp_input.c.orig
-+++ sys/netinet/tcp_input.c
-@@ -512,6 +512,8 @@ tcp6_input(struct mbuf **mp, int *offp, int proto)
- 			    (caddr_t)&ip6->ip6_dst - (caddr_t)ip6);
- 		return IPPROTO_DONE;
- 	}
-+	if (ia6)
-+		ifa_free(&ia6->ia_ifa);
- 
- 	tcp_input(m, *offp);
- 	return IPPROTO_DONE;
-@@ -1240,7 +1242,8 @@ relocked:
- 				rstreason = BANDLIM_RST_OPENPORT;
- 				goto dropwithreset;
- 			}
--			ifa_free(&ia6->ia_ifa);
-+			if (ia6)
-+				ifa_free(&ia6->ia_ifa);
- 		}
- #endif /* INET6 */
- 		/*