Add support for China's bootcdn, staticfile, 75cdn & loli cdn

• 75cdn - lib.baomitu.com
• loli-cdn - *.loli.net
• staticfile - cdn.staticfile.org

Those are public CDN services commonly used in China.

75cdn(lib.baomitu.com), loli-cdn(cdnjs.loli.net) are the mirror of cdnjs(cdnjs.cloudflare.com)\

staticfile host their own lib repo which can be found here: https://github.com/staticfile/static

loli-cdn also has a reverse proxy domain: ajax.loli.net - ajax.googleapis.com