Close issue #602 by changing "/bin" to "/dev".

Author: kwwall

src/test/java/org/owasp/esapi/reference/ValidatorTest.java

@@ -372,7 +372,10 @@ public void testIsValidDirectoryPath() throws IOException {
             // Unix specific paths should pass
             assertTrue(instance.isValidDirectoryPath("test6", "/", parent, false, errors));         // Root directory
             assertTrue(errors.size()==5);
-            assertTrue(instance.isValidDirectoryPath("test7", "/bin", parent, false, errors));      // Always exist directory
+                // Note, we used to say that about '/bin', but Ubuntu 20.x
+                // changed '/bin' to a sym link to 'usr/bin'. We can't use '/etc'
+                // because under MacOS, that is a sym link to 'private/etc'.
+            assertTrue(instance.isValidDirectoryPath("test7", "/dev", parent, false, errors));      // Always exist directory
             assertTrue(errors.size()==5);
 
             // Unix specific paths that should not exist or work