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: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/07f6d9fc02e0bb8b34e772dbc8dd2cca116fbbe3/nsProxyAutoConfig.js/buggy/netwerk/base/src/nsProxyAutoConfig.js