adding vendor folder

vendor/github.com/inconshreveable/go-vhost/shared.go

@@ -0,0 +1,52 @@
+package vhost
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"sync"
+)
+
+const (
+	initVhostBufSize = 1024 // allocate 1 KB up front to try to avoid resizing
+)
+
+type sharedConn struct {
+	sync.Mutex
+	net.Conn               // the raw connection
+	vhostBuf *bytes.Buffer // all of the initial data that has to be read in order to vhost a connection is saved here
+}
+
+func newShared(conn net.Conn) (*sharedConn, io.Reader) {
+	c := &sharedConn{
+		Conn:     conn,
+		vhostBuf: bytes.NewBuffer(make([]byte, 0, initVhostBufSize)),
+	}
+
+	return c, io.TeeReader(conn, c.vhostBuf)
+}
+
+func (c *sharedConn) Read(p []byte) (n int, err error) {
+	c.Lock()
+	if c.vhostBuf == nil {
+		c.Unlock()
+		return c.Conn.Read(p)
+	}
+	n, err = c.vhostBuf.Read(p)
+
+	// end of the request buffer
+	if err == io.EOF {
+		// let the request buffer get garbage collected
+		// and make sure we don't read from it again
+		c.vhostBuf = nil
+
+		// continue reading from the connection
+		var n2 int
+		n2, err = c.Conn.Read(p[n:])
+
+		// update total read
+		n += n2
+	}
+	c.Unlock()
+	return
+}