Java 9: InputStream.transferTo(OutputStream) instead of JVM-based byt…

…e transferTo

Provides potential higher performance.

Signed-off-by: Markus KARG <markus@headcrashing.eu>

src/main/java/org/codehaus/plexus/util/IOUtil.java

@@ -156,7 +156,7 @@ private IOUtil()
     public static void copy( final InputStream input, final OutputStream output )
         throws IOException
     {
-        copy( input, output, DEFAULT_BUFFER_SIZE );
+        input.transferTo( output );
     }
 
     /**