最近eclipse不能更新了，你们的是这样吗？
Some sites could not be found. See the error log for more detail.
Unable to read repository at http://download.eclipse.org/releases/luna/content.xml.
Unrecognized Windows Sockets error: 0: connect
Unable to read repository at http://download.eclipse.org/eclipse/updates/4.4/content.xml.
Unrecognized Windows Sockets error: 0: connect
Some sites could not be found. See the error log for more detail.
Unable to read repository at http://download.eclipse.org/releases/luna/content.xml.
Unrecognized Windows Sockets error: 0: connect
Unable to read repository at http://download.eclipse.org/eclipse/updates/4.4/content.xml.
Unrecognized Windows Sockets error: 0: connect
