diff --git a/vendor/golang.org/x/sys/unix/syscall_freebsd.go b/vendor/golang.org/x/sys/unix/syscall_freebsd.go
index 6932e7c..18c392c 100644
--- a/vendor/golang.org/x/sys/unix/syscall_freebsd.go
+++ b/vendor/golang.org/x/sys/unix/syscall_freebsd.go
@@ -54,6 +54,10 @@
 	raw    RawSockaddrDatalink
 }
 
+func anyToSockaddrGOOS(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
+	return nil, EAFNOSUPPORT
+}
+
 // Translate "kern.hostname" to []_C_int{0,1,2,3}.
 func nametomib(name string) (mib []_C_int, err error) {
 	const siz = unsafe.Sizeof(mib[0])
@@ -122,6 +126,15 @@
 	return setsockopt(fd, level, opt, unsafe.Pointer(mreq), unsafe.Sizeof(*mreq))
 }
 
+// GetsockoptXucred is a getsockopt wrapper that returns an Xucred struct.
+// The usual level and opt are SOL_LOCAL and LOCAL_PEERCRED, respectively.
+func GetsockoptXucred(fd, level, opt int) (*Xucred, error) {
+	x := new(Xucred)
+	vallen := _Socklen(SizeofXucred)
+	err := getsockopt(fd, level, opt, unsafe.Pointer(x), &vallen)
+	return x, err
+}
+
 func Accept4(fd, flags int) (nfd int, sa Sockaddr, err error) {
 	var rsa RawSockaddrAny
 	var len _Socklen = SizeofSockaddrAny
@@ -140,23 +153,8 @@
 	return
 }
 
-const ImplementsGetwd = true
-
 //sys	Getcwd(buf []byte) (n int, err error) = SYS___GETCWD
 
-func Getwd() (string, error) {
-	var buf [PathMax]byte
-	_, err := Getcwd(buf[0:])
-	if err != nil {
-		return "", err
-	}
-	n := clen(buf[:])
-	if n < 1 {
-		return "", EINVAL
-	}
-	return string(buf[:n]), nil
-}
-
 func Getfsstat(buf []Statfs_t, flags int) (n int, err error) {
 	var (
 		_p0          unsafe.Pointer
@@ -199,9 +197,9 @@
 	return ENOSYS
 }
 
-//sys   ioctl(fd int, req uint, arg uintptr) (err error)
+//sys	ioctl(fd int, req uint, arg uintptr) (err error)
 
-//sys   sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
+//sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
 
 func Uname(uname *Utsname) error {
 	mib := []_C_int{CTL_KERN, KERN_OSTYPE}
@@ -676,8 +674,8 @@
 //sys	Unlinkat(dirfd int, path string, flags int) (err error)
 //sys	Unmount(path string, flags int) (err error)
 //sys	write(fd int, p []byte) (n int, err error)
-//sys   mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
-//sys   munmap(addr uintptr, length uintptr) (err error)
+//sys	mmap(addr uintptr, length uintptr, prot int, flag int, fd int, pos int64) (ret uintptr, err error)
+//sys	munmap(addr uintptr, length uintptr) (err error)
 //sys	readlen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_READ
 //sys	writelen(fd int, buf *byte, nbuf int) (n int, err error) = SYS_WRITE
 //sys	accept4(fd int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (nfd int, err error)