Bump golang.org/x/crypto from 0.0.0-20210921155107-089bfa567519 to 0.1.0

Bumps [golang.org/x/crypto](https://github.com/golang/crypto) from 0.0.0-20210921155107-089bfa567519 to 0.1.0.
- [Release notes](https://github.com/golang/crypto/releases)
- [Commits](https://github.com/golang/crypto/commits/v0.1.0)

---
updated-dependencies:
- dependency-name: golang.org/x/crypto
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/golang.org/x/sys/unix/syscall_unix.go

@@ -13,8 +13,6 @@ import (
 	"sync"
 	"syscall"
 	"unsafe"
-
-	"golang.org/x/sys/internal/unsafeheader"
 )
 
 var (
@@ -117,11 +115,7 @@ func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (d
 	}
 
 	// Use unsafe to convert addr into a []byte.
-	var b []byte
-	hdr := (*unsafeheader.Slice)(unsafe.Pointer(&b))
-	hdr.Data = unsafe.Pointer(addr)
-	hdr.Cap = length
-	hdr.Len = length
+	b := unsafe.Slice((*byte)(unsafe.Pointer(addr)), length)
 
 	// Register mapping in m and return it.
 	p := &b[cap(b)-1]
@@ -177,6 +171,30 @@ func Write(fd int, p []byte) (n int, err error) {
 	return
 }
 
+func Pread(fd int, p []byte, offset int64) (n int, err error) {
+	n, err = pread(fd, p, offset)
+	if raceenabled {
+		if n > 0 {
+			raceWriteRange(unsafe.Pointer(&p[0]), n)
+		}
+		if err == nil {
+			raceAcquire(unsafe.Pointer(&ioSync))
+		}
+	}
+	return
+}
+
+func Pwrite(fd int, p []byte, offset int64) (n int, err error) {
+	if raceenabled {
+		raceReleaseMerge(unsafe.Pointer(&ioSync))
+	}
+	n, err = pwrite(fd, p, offset)
+	if raceenabled && n > 0 {
+		raceReadRange(unsafe.Pointer(&p[0]), n)
+	}
+	return
+}
+
 // For testing: clients can set this flag to force
 // creation of IPv6 sockets to return EAFNOSUPPORT.
 var SocketDisableIPv6 bool
@@ -313,12 +331,107 @@ func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) {
 	return
 }
 
-func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
-	ptr, n, err := to.sockaddr()
-	if err != nil {
-		return err
+func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
+	var iov [1]Iovec
+	if len(p) > 0 {
+		iov[0].Base = &p[0]
+		iov[0].SetLen(len(p))
 	}
-	return sendto(fd, p, flags, ptr, n)
+	var rsa RawSockaddrAny
+	n, oobn, recvflags, err = recvmsgRaw(fd, iov[:], oob, flags, &rsa)
+	// source address is only specified if the socket is unconnected
+	if rsa.Addr.Family != AF_UNSPEC {
+		from, err = anyToSockaddr(fd, &rsa)
+	}
+	return
+}
+
+// RecvmsgBuffers receives a message from a socket using the recvmsg
+// system call. The flags are passed to recvmsg. Any non-control data
+// read is scattered into the buffers slices. The results are:
+//   - n is the number of non-control data read into bufs
+//   - oobn is the number of control data read into oob; this may be interpreted using [ParseSocketControlMessage]
+//   - recvflags is flags returned by recvmsg
+//   - from is the address of the sender
+func RecvmsgBuffers(fd int, buffers [][]byte, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) {
+	iov := make([]Iovec, len(buffers))
+	for i := range buffers {
+		if len(buffers[i]) > 0 {
+			iov[i].Base = &buffers[i][0]
+			iov[i].SetLen(len(buffers[i]))
+		} else {
+			iov[i].Base = (*byte)(unsafe.Pointer(&_zero))
+		}
+	}
+	var rsa RawSockaddrAny
+	n, oobn, recvflags, err = recvmsgRaw(fd, iov, oob, flags, &rsa)
+	if err == nil && rsa.Addr.Family != AF_UNSPEC {
+		from, err = anyToSockaddr(fd, &rsa)
+	}
+	return
+}
+
+func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) {
+	_, err = SendmsgN(fd, p, oob, to, flags)
+	return
+}
+
+func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) {
+	var iov [1]Iovec
+	if len(p) > 0 {
+		iov[0].Base = &p[0]
+		iov[0].SetLen(len(p))
+	}
+	var ptr unsafe.Pointer
+	var salen _Socklen
+	if to != nil {
+		ptr, salen, err = to.sockaddr()
+		if err != nil {
+			return 0, err
+		}
+	}
+	return sendmsgN(fd, iov[:], oob, ptr, salen, flags)
+}
+
+// SendmsgBuffers sends a message on a socket to an address using the sendmsg
+// system call. The flags are passed to sendmsg. Any non-control data written
+// is gathered from buffers. The function returns the number of bytes written
+// to the socket.
+func SendmsgBuffers(fd int, buffers [][]byte, oob []byte, to Sockaddr, flags int) (n int, err error) {
+	iov := make([]Iovec, len(buffers))
+	for i := range buffers {
+		if len(buffers[i]) > 0 {
+			iov[i].Base = &buffers[i][0]
+			iov[i].SetLen(len(buffers[i]))
+		} else {
+			iov[i].Base = (*byte)(unsafe.Pointer(&_zero))
+		}
+	}
+	var ptr unsafe.Pointer
+	var salen _Socklen
+	if to != nil {
+		ptr, salen, err = to.sockaddr()
+		if err != nil {
+			return 0, err
+		}
+	}
+	return sendmsgN(fd, iov, oob, ptr, salen, flags)
+}
+
+func Send(s int, buf []byte, flags int) (err error) {
+	return sendto(s, buf, flags, nil, 0)
+}
+
+func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
+	var ptr unsafe.Pointer
+	var salen _Socklen
+	if to != nil {
+		ptr, salen, err = to.sockaddr()
+		if err != nil {
+			return err
+		}
+	}
+	return sendto(fd, p, flags, ptr, salen)
 }
 
 func SetsockoptByte(fd, level, opt int, value byte) (err error) {
@@ -429,3 +542,13 @@ func Lutimes(path string, tv []Timeval) error {
 	}
 	return UtimesNanoAt(AT_FDCWD, path, ts, AT_SYMLINK_NOFOLLOW)
 }
+
+// emptyIovec reports whether there are no bytes in the slice of Iovec.
+func emptyIovecs(iov []Iovec) bool {
+	for i := range iov {
+		if iov[i].Len > 0 {
+			return false
+		}
+	}
+	return true
+}