ReceivePack: Open visibility for some methods

This partially reverts Ic6bb5e66. It made private some methods in
ReceivePack that were protected before. At least two of those methods
(#init and #receivePackAndCheckConnectivity) are used by out-of-tree
subclasses for tracing and testing.

Make ReceivePack#init() and ReceivePack#receivePackAndCheckConnectivity
protected again to allow tracing and testing.

Change-Id: I7ff22c091fbfc2d94009c449d58e7c5ac9f4f759
Signed-off-by: Ivan Frade <ifrade@google.com>

org.eclipse.jgit/src/org/eclipse/jgit/transport/ReceivePack.java

 	/**
 	 * Initialize the instance with the given streams.
 	 *
+	 * Visible for out-of-tree subclasses (e.g. tests that need to set the
+	 * streams without going through the {@link #service()} method).
+	 *
 	 * @param input
 	 *            raw input to read client commands and pack data from. Caller
 	 *            must ensure the input is buffered, otherwise read performance
 	 *            standard error channel of the command execution. For most
 	 *            other network connections this should be null.
 	 */
-	private void init(final InputStream input, final OutputStream output,
+	protected void init(final InputStream input, final OutputStream output,
 			final OutputStream messages) {
 		origOut = output;
 		rawIn = input;
 	/**
 	 * Receive a pack from the stream and check connectivity if necessary.
 	 *
+	 * Visible for out-of-tree subclasses. Subclasses overriding this method
+	 * should invoke this implementation, as it alters the instance state (e.g.
+	 * it reads the pack from the input and parses it before running the
+	 * connectivity checks).
+	 *
 	 * @throws java.io.IOException
 	 *             an error occurred during unpacking or connectivity checking.
 	 */
-	private void receivePackAndCheckConnectivity() throws IOException {
+	protected void receivePackAndCheckConnectivity() throws IOException {
 		receivePack();
 		if (needCheckConnectivity()) {
 			checkSubmodules();