IFF_DORMANT                                 = 0x20000
	IFF_DYNAMIC                                 = 0x8000
	IFF_ECHO                                    = 0x40000
	IFF_LOOPBACK                                = 0x8
	IFF_LOWER_UP                                = 0x10000
	IFF_MASTER                                  = 0x400
	IFF_MULTICAST                               = 0x1000

	ECHOKE                           = 0x800
	ECHONL                           = 0x40
	ECHOPRT                          = 0x400
	EFD_CLOEXEC                      = 0x80000
	EFD_NONBLOCK                     = 0x800
	EPOLL_CLOEXEC                    = 0x80000
	EXTPROC                          = 0x10000
	FF1                              = 0x8000
	FFDLY                            = 0x8000
	FICLONE                          = 0x40049409

	MAP_DENYWRITE                    = 0x800
	MAP_EXECUTABLE                   = 0x1000
	MAP_GROWSDOWN                    = 0x100
	MAP_HUGETLB                      = 0x40000
	MAP_LOCKED                       = 0x2000
	MAP_NONBLOCK                     = 0x10000
	MAP_NORESERVE                    = 0x4000
	MAP_POPULATE                     = 0x8000
	MAP_STACK                        = 0x20000
	MAP_SYNC                         = 0x80000

	ECHOKE                           = 0x800
	ECHONL                           = 0x40
	ECHOPRT                          = 0x400
	EFD_CLOEXEC                      = 0x80000
	EFD_NONBLOCK                     = 0x800
	EPOLL_CLOEXEC                    = 0x80000
	EXTPROC                          = 0x10000
	FF1                              = 0x8000
	FFDLY                            = 0x8000
	FICLONE                          = 0x40049409

	Domainname [65]byte
}

const (
	AT_EMPTY_PATH   = 0x1000
	AT_FDCWD        = -0x64
	AT_NO_AUTOMOUNT = 0x800
	AT_REMOVEDIR    = 0x200

	AT_STATX_SYNC_AS_STAT = 0x0
	AT_STATX_FORCE_SYNC   = 0x2000
	AT_STATX_DONT_SYNC    = 0x4000

	AT_RECURSIVE = 0x8000

	AT_SYMLINK_FOLLOW   = 0x400
	AT_SYMLINK_NOFOLLOW = 0x100

	AT_EACCESS = 0x200

	OPEN_TREE_CLONE = 0x1

const (
	SE_OWNER_DEFAULTED       = 0x0001
	SE_GROUP_DEFAULTED       = 0x0002
	SE_DACL_PRESENT          = 0x0004
	SE_DACL_DEFAULTED        = 0x0008
	SE_SACL_PRESENT          = 0x0010
	SE_SACL_DEFAULTED        = 0x0020
	SE_DACL_AUTO_INHERIT_REQ = 0x0100
	SE_SACL_AUTO_INHERIT_REQ = 0x0200
	SE_DACL_AUTO_INHERITED   = 0x0400
	SE_SACL_AUTO_INHERITED   = 0x0800
	SE_DACL_PROTECTED        = 0x1000

func appendHex(b []byte, x uint16) []byte {
	// Using this function rather than strconv.AppendUint makes IPv6
	// string building 2x faster.

	if x >= 0x1000 {
		b = append(b, digits[x>>12])
	}
	if x >= 0x100 {
		b = append(b, digits[x>>8&0xf])
	}
	if x >= 0x10 {
		b = append(b, digits[x>>4&0xf])
	}
	return append(b, digits[x&0xf])
}

	http2cipher_TLS_NULL_WITH_NULL_NULL               uint16 = 0x0000
	http2cipher_TLS_RSA_WITH_NULL_MD5                 uint16 = 0x0001
	http2cipher_TLS_RSA_WITH_NULL_SHA                 uint16 = 0x0002
	http2cipher_TLS_RSA_EXPORT_WITH_RC4_40_MD5        uint16 = 0x0003
	http2cipher_TLS_RSA_WITH_RC4_128_MD5              uint16 = 0x0004
	http2cipher_TLS_RSA_WITH_RC4_128_SHA              uint16 = 0x0005