Update vendor

vendor/github.com/valyala/fasthttp/bytebuffer.go

@@ -0,0 +1,64 @@
+package fasthttp
+
+import (
+	"github.com/valyala/bytebufferpool"
+)
+
+// ByteBuffer provides byte buffer, which can be used with fasthttp API
+// in order to minimize memory allocations.
+//
+// ByteBuffer may be used with functions appending data to the given []byte
+// slice. See example code for details.
+//
+// Use AcquireByteBuffer for obtaining an empty byte buffer.
+//
+// ByteBuffer is deprecated. Use github.com/valyala/bytebufferpool instead.
+type ByteBuffer bytebufferpool.ByteBuffer
+
+// Write implements io.Writer - it appends p to ByteBuffer.B
+func (b *ByteBuffer) Write(p []byte) (int, error) {
+	return bb(b).Write(p)
+}
+
+// WriteString appends s to ByteBuffer.B
+func (b *ByteBuffer) WriteString(s string) (int, error) {
+	return bb(b).WriteString(s)
+}
+
+// Set sets ByteBuffer.B to p
+func (b *ByteBuffer) Set(p []byte) {
+	bb(b).Set(p)
+}
+
+// SetString sets ByteBuffer.B to s
+func (b *ByteBuffer) SetString(s string) {
+	bb(b).SetString(s)
+}
+
+// Reset makes ByteBuffer.B empty.
+func (b *ByteBuffer) Reset() {
+	bb(b).Reset()
+}
+
+// AcquireByteBuffer returns an empty byte buffer from the pool.
+//
+// Acquired byte buffer may be returned to the pool via ReleaseByteBuffer call.
+// This reduces the number of memory allocations required for byte buffer
+// management.
+func AcquireByteBuffer() *ByteBuffer {
+	return (*ByteBuffer)(defaultByteBufferPool.Get())
+}
+
+// ReleaseByteBuffer returns byte buffer to the pool.
+//
+// ByteBuffer.B mustn't be touched after returning it to the pool.
+// Otherwise data races occur.
+func ReleaseByteBuffer(b *ByteBuffer) {
+	defaultByteBufferPool.Put(bb(b))
+}
+
+func bb(b *ByteBuffer) *bytebufferpool.ByteBuffer {
+	return (*bytebufferpool.ByteBuffer)(b)
+}
+
+var defaultByteBufferPool bytebufferpool.Pool