rem:  return false; 
add: var ip = dnsResolve(host); return (ip != null) ? true: false; 
context: function isResolvable(host) {    // call back into IOService and get the result... TODO    return false;}
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/01e3f7007e4bfc370c385c04821c5c21fb63d151/nsProxyAutoConfig.js/clean/netwerk/base/src/nsProxyAutoConfig.js