[Bug 353165] remove a directory check for directories of jar files,

rational being that some users wish to point to unpacked jar files
using symbolic links and this was preventing that behavior

VERSION.txt

@@ -9,6 +9,7 @@ jetty-7.5.0-SNAPSHOT
  + 352786 GzipFilter fails to pass parameters to GzipResponseWrapper
  + 353073 WebSocketClient
  + 353095 maven-jetty-plugin: PermGen leak due to javax.el.BeanELResolver
+ + 353165 addJars can follow symbolic link jar files
  + 353210 Bundle-Version in o.e.j.o.boot.logback fix
  
 jetty-7.4.4.v20110707 July 7th 2011

jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java

@@ -264,7 +264,8 @@ public class WebAppClassLoader extends URLClassLoader
                 {
                     Resource fn=lib.addPath(files[f]);
                     String fnlc=fn.getName().toLowerCase();
-                    if (!fn.isDirectory() && isFileSupported(fnlc))
+                    // don't check if this is a directory, see Bug 353165
+                    if (isFileSupported(fnlc))
                     {
                         String jar=fn.toString();
                         jar=StringUtil.replace(jar, ",", "%2C");