6921610: 1.6 update 17 and 18 throw java.lang.IndexOutOfBoundsException

Reviewed-by: vinnie, xuelei

src/share/classes/com/sun/jndi/ldap/Connection.java

@@ -813,7 +813,8 @@ public final class Connection implements Runnable {
         try {
             while (true) {
                 try {
-                    inbuf = new byte[10];
+                    // type and length (at most 128 octets for long form)
+                    inbuf = new byte[129];
 
                     offset = 0;
                     seqlen = 0;