Mark BufferedTokenStream.reset as deprecated to avoid confusion

See #895

runtime/Java/src/org/antlr/v4/runtime/BufferedTokenStream.java

@@ -89,6 +89,14 @@ public class BufferedTokenStream implements TokenStream {
 		// no resources to release
 	}
 
+	/**
+	 * This method resets the token stream back to the first token in the
+	 * buffer. It is equivalent to calling {@link #seek}{@code (0)}.
+	 *
+	 * @see #setTokenSource(TokenSource)
+	 * @deprecated Use {@code seek(0)} instead.
+	 */
+	@Deprecated
     public void reset() {
         seek(0);
     }

tool-testsuite/test/org/antlr/v4/test/tool/TestPerformance.java

@@ -1288,7 +1288,7 @@ public class TestPerformance extends BaseJavaToolTest {
 								throw ex;
 							}
 
-							tokens.reset();
+							tokens.seek(0);
 							if (REUSE_PARSER && parser != null) {
 								parser.setInputStream(tokens);
 							} else {