Support popular mirrors of already supported CDNs

Created by: ivysrono

fonts.gstatic.com-------------------fonts-gstatic.proxy.ustclug.org fonts.googleapis.com--------------fonts.proxy.ustclug.org ajax.googleapis.com----------------ajax.proxy.ustclug.org storage.googleapis.com------------storage-googleapis.proxy.ustclug.org themes.googleusercontent.com----google-themes.proxy.ustclug.org gerrit.googlesource.com-----------gerrit-googlesource.proxy.ustclug.org secure.gravatar.com---------------gravatar.proxy.ustclug.org

fonts.googleapis.com------------------->fonts.geekzu.org ajax.googleapis.com-------------------->sdn.geekzu.org/ajax themes.googleusercontent.com------->sdn.geekzu.org/g-themes fonts.gstatic.com------------------------->sdn.geekzu.org/g-fonts

They are very popular mirror sites for google in China. They are equal. However, they are not replaced by decentraleyes.