title: eclipse mars/luna unable to read repository
body: <p>I can't use the default repositories with eclipse mars. For example the <code>http://download.eclipse.org/eclipse/updates/4.5/</code>. There is no problem with the proxy. I can reach <code>http://download.eclipse.org/eclipse/updates/4.5/</code> with the internal web browser of eclipse. The problem is that it always tries to connect to the url <code>http://download.eclipse.org/eclipse/updates/4.5/compositeContent.xml</code> which does not exist (getting 404 opening it in the browser). I really don't know why.</p>
  
  <p>The error is: </p>
  
  <pre><code>Unable to connect to repository http://download.eclipse.org/eclipse/updates/4.5/compositeContent.xml
  </code></pre>
  
  <p>Stacktrace:</p>
  
  <pre><code>java.net.ConnectException: Connection timed out: connect
  at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
  at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
  at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
  at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
  at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
  at java.net.PlainSocketImpl.connect(Unknown Source)
  at java.net.SocksSocketImpl.connect(Unknown Source)
  at java.net.Socket.connect(Unknown Source)
  at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117)
  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:177)
  at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304)
  at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:611)
  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:446)
  at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863)
  at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
  at org.eclipse.ecf.provider.filetransfer.httpclient4.HttpClientFileSystemBrowser.runRequest(HttpClientFileSystemBrowser.java:259)
  at org.eclipse.ecf.provider.filetransfer.browse.AbstractFileSystemBrowser$DirectoryJob.run(AbstractFileSystemBrowser.java:69)
  at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
  </code></pre>
  
  <p>EDIT: Tried out Eclipse Luna, same problem.</p>