Update dependencies

vendor/golang.org/x/net/ipv4/zsys_darwin.go

@@ -4,45 +4,11 @@
 package ipv4
 
 const (
-	sysIP_OPTIONS     = 0x1
-	sysIP_HDRINCL     = 0x2
-	sysIP_TOS         = 0x3
-	sysIP_TTL         = 0x4
-	sysIP_RECVOPTS    = 0x5
-	sysIP_RECVRETOPTS = 0x6
-	sysIP_RECVDSTADDR = 0x7
-	sysIP_RETOPTS     = 0x8
-	sysIP_RECVIF      = 0x14
-	sysIP_STRIPHDR    = 0x17
-	sysIP_RECVTTL     = 0x18
-	sysIP_BOUND_IF    = 0x19
-	sysIP_PKTINFO     = 0x1a
-	sysIP_RECVPKTINFO = 0x1a
-
-	sysIP_MULTICAST_IF           = 0x9
-	sysIP_MULTICAST_TTL          = 0xa
-	sysIP_MULTICAST_LOOP         = 0xb
-	sysIP_ADD_MEMBERSHIP         = 0xc
-	sysIP_DROP_MEMBERSHIP        = 0xd
-	sysIP_MULTICAST_VIF          = 0xe
-	sysIP_MULTICAST_IFINDEX      = 0x42
-	sysIP_ADD_SOURCE_MEMBERSHIP  = 0x46
-	sysIP_DROP_SOURCE_MEMBERSHIP = 0x47
-	sysIP_BLOCK_SOURCE           = 0x48
-	sysIP_UNBLOCK_SOURCE         = 0x49
-	sysMCAST_JOIN_GROUP          = 0x50
-	sysMCAST_LEAVE_GROUP         = 0x51
-	sysMCAST_JOIN_SOURCE_GROUP   = 0x52
-	sysMCAST_LEAVE_SOURCE_GROUP  = 0x53
-	sysMCAST_BLOCK_SOURCE        = 0x54
-	sysMCAST_UNBLOCK_SOURCE      = 0x55
-
 	sizeofSockaddrStorage = 0x80
 	sizeofSockaddrInet    = 0x10
 	sizeofInetPktinfo     = 0xc
 
 	sizeofIPMreq         = 0x8
-	sizeofIPMreqn        = 0xc
 	sizeofIPMreqSource   = 0xc
 	sizeofGroupReq       = 0x84
 	sizeofGroupSourceReq = 0x104
@@ -75,12 +41,6 @@ type ipMreq struct {
 	Interface [4]byte /* in_addr */
 }
 
-type ipMreqn struct {
-	Multiaddr [4]byte /* in_addr */
-	Address   [4]byte /* in_addr */
-	Ifindex   int32
-}
-
 type ipMreqSource struct {
 	Multiaddr  [4]byte /* in_addr */
 	Sourceaddr [4]byte /* in_addr */