Put enableIDN line back in for now, that wasn't part of bug 397811

mail/app/profile/all-thunderbird.js

@@ -333,6 +333,7 @@ pref("browser.download.manager.addToRecentDocs", true);
 
 pref("javascript.options.showInConsole",    true);
 
+pref("network.enableIDN",                   false); // Turn on/off IDN (Internationalized Domain Name) resolution
 pref("wallet.captureForms",                 true);
 pref("wallet.enabled",                      true);
 pref("wallet.crypto",                       false);