Fixed Misleading Javadoc

The javadoc for the setRenameLimit method in RenameDetector said
that you could only have limits in the range (0,100), implying
that 0 and 100 were illegal inputs. The code, however, allowed 0 and
100. I changed the javadoc to say that the range [0,100] was legal.
I also documented the IllegalArgumentException that is thrown if the
limit is outside that range.

Change-Id: I916838f254859f6f0e1516bb55b8e7dc87e57dc2

org.eclipse.jgit/src/org/eclipse/jgit/diff/RenameDetector.java

 	 * that approximately 60% of the bytes in the files are identical.
 	 *
 	 * @param score
-	 *            new rename score, must be within (0, 100).
+	 *            new rename score, must be within [0, 100].
+	 * @throws IllegalArgumentException
+	 *             the score was not within [0, 100].
 	 */
 	public void setRenameScore(int score) {
 		if (score < 0 || score > 100)