Add missing @since tags for new public methods in Config

Change-Id: I3b7937577c897a7e298ee431bd8c052cdb293dd9
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/lib/Config.java

@@ -534,6 +534,7 @@ public class Config {
 	 *            if {@code true} recursively adds the names defined in all base
 	 *            configurations
 	 * @return the list of names defined for this section
+	 * @since 3.2
 	 */
 	public Set<String> getNames(String section, boolean recursive) {
 		return getState().getNames(section, null, recursive);
@@ -548,6 +549,7 @@ public class Config {
 	 *            if {@code true} recursively adds the names defined in all base
 	 *            configurations
 	 * @return the list of names defined for this subsection
+	 * @since 3.2
 	 */
 	public Set<String> getNames(String section, String subsection,
 			boolean recursive) {