Fix some Go Lint errors

bufferpool/bufpool.go

@@ -24,10 +24,13 @@ var bufferPool = &sync.Pool{
 	},
 }
 
+// GetBuffer returns a buffer from the pool.
 func GetBuffer() (buf *bytes.Buffer) {
 	return bufferPool.Get().(*bytes.Buffer)
 }
 
+// PutBuffer returns a buffer to the pool.
+// The buffer is reset before it is put back into circulation.
 func PutBuffer(buf *bytes.Buffer) {
 	buf.Reset()
 	bufferPool.Put(buf)