diff --git a/vendor/golang.org/x/sys/unix/syscall_linux.go b/vendor/golang.org/x/sys/unix/syscall_linux.go
index 95f7a15..558f07b 100644
--- a/vendor/golang.org/x/sys/unix/syscall_linux.go
+++ b/vendor/golang.org/x/sys/unix/syscall_linux.go
@@ -13,6 +13,7 @@
 
 import (
 	"encoding/binary"
+	"net"
 	"runtime"
 	"syscall"
 	"unsafe"
@@ -71,17 +72,6 @@
 // ioctl itself should not be exposed directly, but additional get/set
 // functions for specific types are permissible.
 
-// IoctlRetInt performs an ioctl operation specified by req on a device
-// associated with opened file descriptor fd, and returns a non-negative
-// integer that is returned by the ioctl syscall.
-func IoctlRetInt(fd int, req uint) (int, error) {
-	ret, _, err := Syscall(SYS_IOCTL, uintptr(fd), uintptr(req), 0)
-	if err != 0 {
-		return 0, err
-	}
-	return int(ret), nil
-}
-
 // IoctlSetPointerInt performs an ioctl operation which sets an
 // integer value on fd, using the specified request number. The ioctl
 // argument is called with a pointer to the integer value, rather than
@@ -91,18 +81,46 @@
 	return ioctl(fd, req, uintptr(unsafe.Pointer(&v)))
 }
 
+// IoctlSetInt performs an ioctl operation which sets an integer value
+// on fd, using the specified request number.
+func IoctlSetInt(fd int, req uint, value int) error {
+	return ioctl(fd, req, uintptr(value))
+}
+
+func ioctlSetWinsize(fd int, req uint, value *Winsize) error {
+	return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
+}
+
+func ioctlSetTermios(fd int, req uint, value *Termios) error {
+	return ioctl(fd, req, uintptr(unsafe.Pointer(value)))
+}
+
 func IoctlSetRTCTime(fd int, value *RTCTime) error {
 	err := ioctl(fd, RTC_SET_TIME, uintptr(unsafe.Pointer(value)))
 	runtime.KeepAlive(value)
 	return err
 }
 
-func IoctlGetUint32(fd int, req uint) (uint32, error) {
-	var value uint32
+// IoctlGetInt performs an ioctl operation which gets an integer value
+// from fd, using the specified request number.
+func IoctlGetInt(fd int, req uint) (int, error) {
+	var value int
 	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
 	return value, err
 }
 
+func IoctlGetWinsize(fd int, req uint) (*Winsize, error) {
+	var value Winsize
+	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	return &value, err
+}
+
+func IoctlGetTermios(fd int, req uint) (*Termios, error) {
+	var value Termios
+	err := ioctl(fd, req, uintptr(unsafe.Pointer(&value)))
+	return &value, err
+}
+
 func IoctlGetRTCTime(fd int) (*RTCTime, error) {
 	var value RTCTime
 	err := ioctl(fd, RTC_RD_TIME, uintptr(unsafe.Pointer(&value)))
@@ -741,7 +759,7 @@
 
 type SockaddrPPPoE struct {
 	SID    uint16
-	Remote []byte
+	Remote net.HardwareAddr
 	Dev    string
 	raw    RawSockaddrPPPoX
 }
@@ -775,70 +793,6 @@
 	return unsafe.Pointer(&sa.raw), SizeofSockaddrPPPoX, nil
 }
 
-// SockaddrTIPC implements the Sockaddr interface for AF_TIPC type sockets.
-// For more information on TIPC, see: http://tipc.sourceforge.net/.
-type SockaddrTIPC struct {
-	// Scope is the publication scopes when binding service/service range.
-	// Should be set to TIPC_CLUSTER_SCOPE or TIPC_NODE_SCOPE.
-	Scope int
-
-	// Addr is the type of address used to manipulate a socket. Addr must be
-	// one of:
-	//  - *TIPCSocketAddr: "id" variant in the C addr union
-	//  - *TIPCServiceRange: "nameseq" variant in the C addr union
-	//  - *TIPCServiceName: "name" variant in the C addr union
-	//
-	// If nil, EINVAL will be returned when the structure is used.
-	Addr TIPCAddr
-
-	raw RawSockaddrTIPC
-}
-
-// TIPCAddr is implemented by types that can be used as an address for
-// SockaddrTIPC. It is only implemented by *TIPCSocketAddr, *TIPCServiceRange,
-// and *TIPCServiceName.
-type TIPCAddr interface {
-	tipcAddrtype() uint8
-	tipcAddr() [12]byte
-}
-
-func (sa *TIPCSocketAddr) tipcAddr() [12]byte {
-	var out [12]byte
-	copy(out[:], (*(*[unsafe.Sizeof(TIPCSocketAddr{})]byte)(unsafe.Pointer(sa)))[:])
-	return out
-}
-
-func (sa *TIPCSocketAddr) tipcAddrtype() uint8 { return TIPC_SOCKET_ADDR }
-
-func (sa *TIPCServiceRange) tipcAddr() [12]byte {
-	var out [12]byte
-	copy(out[:], (*(*[unsafe.Sizeof(TIPCServiceRange{})]byte)(unsafe.Pointer(sa)))[:])
-	return out
-}
-
-func (sa *TIPCServiceRange) tipcAddrtype() uint8 { return TIPC_SERVICE_RANGE }
-
-func (sa *TIPCServiceName) tipcAddr() [12]byte {
-	var out [12]byte
-	copy(out[:], (*(*[unsafe.Sizeof(TIPCServiceName{})]byte)(unsafe.Pointer(sa)))[:])
-	return out
-}
-
-func (sa *TIPCServiceName) tipcAddrtype() uint8 { return TIPC_SERVICE_ADDR }
-
-func (sa *SockaddrTIPC) sockaddr() (unsafe.Pointer, _Socklen, error) {
-	if sa.Addr == nil {
-		return nil, 0, EINVAL
-	}
-
-	sa.raw.Family = AF_TIPC
-	sa.raw.Scope = int8(sa.Scope)
-	sa.raw.Addrtype = sa.Addr.tipcAddrtype()
-	sa.raw.Addr = sa.Addr.tipcAddr()
-
-	return unsafe.Pointer(&sa.raw), SizeofSockaddrTIPC, nil
-}
-
 func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 	switch rsa.Addr.Family {
 	case AF_NETLINK:
@@ -884,7 +838,7 @@
 		for n < len(pp.Path) && pp.Path[n] != 0 {
 			n++
 		}
-		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
 		sa.Name = string(bytes)
 		return sa, nil
 
@@ -956,7 +910,7 @@
 		}
 		sa := &SockaddrPPPoE{
 			SID:    binary.BigEndian.Uint16(pp[6:8]),
-			Remote: pp[8:14],
+			Remote: net.HardwareAddr(pp[8:14]),
 		}
 		for i := 14; i < 14+IFNAMSIZ; i++ {
 			if pp[i] == 0 {
@@ -965,27 +919,6 @@
 			}
 		}
 		return sa, nil
-	case AF_TIPC:
-		pp := (*RawSockaddrTIPC)(unsafe.Pointer(rsa))
-
-		sa := &SockaddrTIPC{
-			Scope: int(pp.Scope),
-		}
-
-		// Determine which union variant is present in pp.Addr by checking
-		// pp.Addrtype.
-		switch pp.Addrtype {
-		case TIPC_SERVICE_RANGE:
-			sa.Addr = (*TIPCServiceRange)(unsafe.Pointer(&pp.Addr))
-		case TIPC_SERVICE_ADDR:
-			sa.Addr = (*TIPCServiceName)(unsafe.Pointer(&pp.Addr))
-		case TIPC_SOCKET_ADDR:
-			sa.Addr = (*TIPCSocketAddr)(unsafe.Pointer(&pp.Addr))
-		default:
-			return nil, EINVAL
-		}
-
-		return sa, nil
 	}
 	return nil, EAFNOSUPPORT
 }
@@ -1222,34 +1155,6 @@
 	return keyctlDH(KEYCTL_DH_COMPUTE, params, buffer)
 }
 
-// KeyctlRestrictKeyring implements the KEYCTL_RESTRICT_KEYRING command. This
-// command limits the set of keys that can be linked to the keyring, regardless
-// of keyring permissions. The command requires the "setattr" permission.
-//
-// When called with an empty keyType the command locks the keyring, preventing
-// any further keys from being linked to the keyring.
-//
-// The "asymmetric" keyType defines restrictions requiring key payloads to be
-// DER encoded X.509 certificates signed by keys in another keyring. Restrictions
-// for "asymmetric" include "builtin_trusted", "builtin_and_secondary_trusted",
-// "key_or_keyring:<key>", and "key_or_keyring:<key>:chain".
-//
-// As of Linux 4.12, only the "asymmetric" keyType defines type-specific
-// restrictions.
-//
-// See the full documentation at:
-// http://man7.org/linux/man-pages/man3/keyctl_restrict_keyring.3.html
-// http://man7.org/linux/man-pages/man2/keyctl.2.html
-func KeyctlRestrictKeyring(ringid int, keyType string, restriction string) error {
-	if keyType == "" {
-		return keyctlRestrictKeyring(KEYCTL_RESTRICT_KEYRING, ringid)
-	}
-	return keyctlRestrictKeyringByType(KEYCTL_RESTRICT_KEYRING, ringid, keyType, restriction)
-}
-
-//sys keyctlRestrictKeyringByType(cmd int, arg2 int, keyType string, restriction string) (err error) = SYS_KEYCTL
-//sys keyctlRestrictKeyring(cmd int, arg2 int) (err error) = SYS_KEYCTL
-
 func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
 	var msg Msghdr
 	var rsa RawSockaddrAny
@@ -1493,12 +1398,8 @@
 
 func PtraceSingleStep(pid int) (err error) { return ptrace(PTRACE_SINGLESTEP, pid, 0, 0) }
 
-func PtraceInterrupt(pid int) (err error) { return ptrace(PTRACE_INTERRUPT, pid, 0, 0) }
-
 func PtraceAttach(pid int) (err error) { return ptrace(PTRACE_ATTACH, pid, 0, 0) }
 
-func PtraceSeize(pid int) (err error) { return ptrace(PTRACE_SEIZE, pid, 0, 0) }
-
 func PtraceDetach(pid int) (err error) { return ptrace(PTRACE_DETACH, pid, 0, 0) }
 
 //sys	reboot(magic1 uint, magic2 uint, cmd int, arg string) (err error)
@@ -1507,20 +1408,8 @@
 	return reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, "")
 }
 
-func direntIno(buf []byte) (uint64, bool) {
-	return readInt(buf, unsafe.Offsetof(Dirent{}.Ino), unsafe.Sizeof(Dirent{}.Ino))
-}
-
-func direntReclen(buf []byte) (uint64, bool) {
-	return readInt(buf, unsafe.Offsetof(Dirent{}.Reclen), unsafe.Sizeof(Dirent{}.Reclen))
-}
-
-func direntNamlen(buf []byte) (uint64, bool) {
-	reclen, ok := direntReclen(buf)
-	if !ok {
-		return 0, false
-	}
-	return reclen - uint64(unsafe.Offsetof(Dirent{}.Name)), true
+func ReadDirent(fd int, buf []byte) (n int, err error) {
+	return Getdents(fd, buf)
 }
 
 //sys	mount(source string, target string, fstype string, flags uintptr, data *byte) (err error)
@@ -1555,8 +1444,6 @@
 //sys	Acct(path string) (err error)
 //sys	AddKey(keyType string, description string, payload []byte, ringid int) (id int, err error)
 //sys	Adjtimex(buf *Timex) (state int, err error)
-//sysnb	Capget(hdr *CapUserHeader, data *CapUserData) (err error)
-//sysnb	Capset(hdr *CapUserHeader, data *CapUserData) (err error)
 //sys	Chdir(path string) (err error)
 //sys	Chroot(path string) (err error)
 //sys	ClockGetres(clockid int32, res *Timespec) (err error)
@@ -1575,6 +1462,7 @@
 //sys	Fchdir(fd int) (err error)
 //sys	Fchmod(fd int, mode uint32) (err error)
 //sys	Fchownat(dirfd int, path string, uid int, gid int, flags int) (err error)
+//sys	fcntl(fd int, cmd int, arg int) (val int, err error)
 //sys	Fdatasync(fd int) (err error)
 //sys	Fgetxattr(fd int, attr string, dest []byte) (sz int, err error)
 //sys	FinitModule(fd int, params string, flags int) (err error)
@@ -1630,17 +1518,6 @@
 //sysnb	Settimeofday(tv *Timeval) (err error)
 //sys	Setns(fd int, nstype int) (err error)
 
-// PrctlRetInt performs a prctl operation specified by option and further
-// optional arguments arg2 through arg5 depending on option. It returns a
-// non-negative integer that is returned by the prctl syscall.
-func PrctlRetInt(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (int, error) {
-	ret, _, err := Syscall6(SYS_PRCTL, uintptr(option), uintptr(arg2), uintptr(arg3), uintptr(arg4), uintptr(arg5), 0)
-	if err != 0 {
-		return 0, err
-	}
-	return int(ret), nil
-}
-
 // issue 1435.
 // On linux Setuid and Setgid only affects the current thread, not the process.
 // This does not match what most callers expect so we must return an error
@@ -1654,37 +1531,9 @@
 	return EOPNOTSUPP
 }
 
-// SetfsgidRetGid sets fsgid for current thread and returns previous fsgid set.
-// setfsgid(2) will return a non-nil error only if its caller lacks CAP_SETUID capability.
-// If the call fails due to other reasons, current fsgid will be returned.
-func SetfsgidRetGid(gid int) (int, error) {
-	return setfsgid(gid)
-}
-
-// SetfsuidRetUid sets fsuid for current thread and returns previous fsuid set.
-// setfsgid(2) will return a non-nil error only if its caller lacks CAP_SETUID capability
-// If the call fails due to other reasons, current fsuid will be returned.
-func SetfsuidRetUid(uid int) (int, error) {
-	return setfsuid(uid)
-}
-
-func Setfsgid(gid int) error {
-	_, err := setfsgid(gid)
-	return err
-}
-
-func Setfsuid(uid int) error {
-	_, err := setfsuid(uid)
-	return err
-}
-
-func Signalfd(fd int, sigmask *Sigset_t, flags int) (newfd int, err error) {
-	return signalfd(fd, sigmask, _C__NSIG/8, flags)
-}
-
 //sys	Setpriority(which int, who int, prio int) (err error)
 //sys	Setxattr(path string, attr string, data []byte, flags int) (err error)
-//sys	signalfd(fd int, sigmask *Sigset_t, maskSize uintptr, flags int) (newfd int, err error) = SYS_SIGNALFD4
+//sys	Signalfd(fd int, mask *Sigset_t, flags int) = SYS_SIGNALFD4
 //sys	Statx(dirfd int, path string, flags int, mask int, stat *Statx_t) (err error)
 //sys	Sync()
 //sys	Syncfs(fd int) (err error)
@@ -1700,123 +1549,6 @@
 //sys	exitThread(code int) (err error) = SYS_EXIT
 //sys	readlen(fd int, p *byte, np int) (n int, err error) = SYS_READ
 //sys	writelen(fd int, p *byte, np int) (n int, err error) = SYS_WRITE
-//sys	readv(fd int, iovs []Iovec) (n int, err error) = SYS_READV
-//sys	writev(fd int, iovs []Iovec) (n int, err error) = SYS_WRITEV
-//sys	preadv(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PREADV
-//sys	pwritev(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr) (n int, err error) = SYS_PWRITEV
-//sys	preadv2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PREADV2
-//sys	pwritev2(fd int, iovs []Iovec, offs_l uintptr, offs_h uintptr, flags int) (n int, err error) = SYS_PWRITEV2
-
-func bytes2iovec(bs [][]byte) []Iovec {
-	iovecs := make([]Iovec, len(bs))
-	for i, b := range bs {
-		iovecs[i].SetLen(len(b))
-		if len(b) > 0 {
-			iovecs[i].Base = &b[0]
-		} else {
-			iovecs[i].Base = (*byte)(unsafe.Pointer(&_zero))
-		}
-	}
-	return iovecs
-}
-
-// offs2lohi splits offs into its lower and upper unsigned long. On 64-bit
-// systems, hi will always be 0. On 32-bit systems, offs will be split in half.
-// preadv/pwritev chose this calling convention so they don't need to add a
-// padding-register for alignment on ARM.
-func offs2lohi(offs int64) (lo, hi uintptr) {
-	return uintptr(offs), uintptr(uint64(offs) >> SizeofLong)
-}
-
-func Readv(fd int, iovs [][]byte) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	n, err = readv(fd, iovecs)
-	readvRacedetect(iovecs, n, err)
-	return n, err
-}
-
-func Preadv(fd int, iovs [][]byte, offset int64) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	lo, hi := offs2lohi(offset)
-	n, err = preadv(fd, iovecs, lo, hi)
-	readvRacedetect(iovecs, n, err)
-	return n, err
-}
-
-func Preadv2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	lo, hi := offs2lohi(offset)
-	n, err = preadv2(fd, iovecs, lo, hi, flags)
-	readvRacedetect(iovecs, n, err)
-	return n, err
-}
-
-func readvRacedetect(iovecs []Iovec, n int, err error) {
-	if !raceenabled {
-		return
-	}
-	for i := 0; n > 0 && i < len(iovecs); i++ {
-		m := int(iovecs[i].Len)
-		if m > n {
-			m = n
-		}
-		n -= m
-		if m > 0 {
-			raceWriteRange(unsafe.Pointer(iovecs[i].Base), m)
-		}
-	}
-	if err == nil {
-		raceAcquire(unsafe.Pointer(&ioSync))
-	}
-}
-
-func Writev(fd int, iovs [][]byte) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	if raceenabled {
-		raceReleaseMerge(unsafe.Pointer(&ioSync))
-	}
-	n, err = writev(fd, iovecs)
-	writevRacedetect(iovecs, n)
-	return n, err
-}
-
-func Pwritev(fd int, iovs [][]byte, offset int64) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	if raceenabled {
-		raceReleaseMerge(unsafe.Pointer(&ioSync))
-	}
-	lo, hi := offs2lohi(offset)
-	n, err = pwritev(fd, iovecs, lo, hi)
-	writevRacedetect(iovecs, n)
-	return n, err
-}
-
-func Pwritev2(fd int, iovs [][]byte, offset int64, flags int) (n int, err error) {
-	iovecs := bytes2iovec(iovs)
-	if raceenabled {
-		raceReleaseMerge(unsafe.Pointer(&ioSync))
-	}
-	lo, hi := offs2lohi(offset)
-	n, err = pwritev2(fd, iovecs, lo, hi, flags)
-	writevRacedetect(iovecs, n)
-	return n, err
-}
-
-func writevRacedetect(iovecs []Iovec, n int) {
-	if !raceenabled {
-		return
-	}
-	for i := 0; n > 0 && i < len(iovecs); i++ {
-		m := int(iovecs[i].Len)
-		if m > n {
-			m = n
-		}
-		n -= m
-		if m > 0 {
-			raceReadRange(unsafe.Pointer(iovecs[i].Base), m)
-		}
-	}
-}
 
 // mmap varies by architecture; see syscall_linux_*.go.
 //sys	munmap(addr uintptr, length uintptr) (err error)
@@ -1943,80 +1675,6 @@
 	Type  int32
 }
 
-// FileHandle represents the C struct file_handle used by
-// name_to_handle_at (see NameToHandleAt) and open_by_handle_at (see
-// OpenByHandleAt).
-type FileHandle struct {
-	*fileHandle
-}
-
-// NewFileHandle constructs a FileHandle.
-func NewFileHandle(handleType int32, handle []byte) FileHandle {
-	const hdrSize = unsafe.Sizeof(fileHandle{})
-	buf := make([]byte, hdrSize+uintptr(len(handle)))
-	copy(buf[hdrSize:], handle)
-	fh := (*fileHandle)(unsafe.Pointer(&buf[0]))
-	fh.Type = handleType
-	fh.Bytes = uint32(len(handle))
-	return FileHandle{fh}
-}
-
-func (fh *FileHandle) Size() int   { return int(fh.fileHandle.Bytes) }
-func (fh *FileHandle) Type() int32 { return fh.fileHandle.Type }
-func (fh *FileHandle) Bytes() []byte {
-	n := fh.Size()
-	if n == 0 {
-		return nil
-	}
-	return (*[1 << 30]byte)(unsafe.Pointer(uintptr(unsafe.Pointer(&fh.fileHandle.Type)) + 4))[:n:n]
-}
-
-// NameToHandleAt wraps the name_to_handle_at system call; it obtains
-// a handle for a path name.
-func NameToHandleAt(dirfd int, path string, flags int) (handle FileHandle, mountID int, err error) {
-	var mid _C_int
-	// Try first with a small buffer, assuming the handle will
-	// only be 32 bytes.
-	size := uint32(32 + unsafe.Sizeof(fileHandle{}))
-	didResize := false
-	for {
-		buf := make([]byte, size)
-		fh := (*fileHandle)(unsafe.Pointer(&buf[0]))
-		fh.Bytes = size - uint32(unsafe.Sizeof(fileHandle{}))
-		err = nameToHandleAt(dirfd, path, fh, &mid, flags)
-		if err == EOVERFLOW {
-			if didResize {
-				// We shouldn't need to resize more than once
-				return
-			}
-			didResize = true
-			size = fh.Bytes + uint32(unsafe.Sizeof(fileHandle{}))
-			continue
-		}
-		if err != nil {
-			return
-		}
-		return FileHandle{fh}, int(mid), nil
-	}
-}
-
-// OpenByHandleAt wraps the open_by_handle_at system call; it opens a
-// file via a handle as previously returned by NameToHandleAt.
-func OpenByHandleAt(mountFD int, handle FileHandle, flags int) (fd int, err error) {
-	return openByHandleAt(mountFD, handle.fileHandle, flags)
-}
-
-// Klogset wraps the sys_syslog system call; it sets console_loglevel to
-// the value specified by arg and passes a dummy pointer to bufp.
-func Klogset(typ int, arg int) (err error) {
-	var p unsafe.Pointer
-	_, _, errno := Syscall(SYS_SYSLOG, uintptr(typ), uintptr(p), uintptr(arg))
-	if errno != 0 {
-		return errnoErr(errno)
-	}
-	return nil
-}
-
 /*
  * Unimplemented
  */
@@ -2024,6 +1682,8 @@
 // Alarm
 // ArchPrctl
 // Brk
+// Capget
+// Capset
 // ClockNanosleep
 // ClockSettime
 // Clone