Fixing bug 76388. Adding a default pref which will be used by incoming servers to check if the offline support level is already set. r=bienvenu, sr=sspitzer

mailnews/mailnews.js

@@ -259,6 +259,7 @@ pref("mail.collect_email_address_size_limit", 700);
 pref("mail.default_sendlater_uri","mailbox://nobody@Local Folders/Unsent Messages");
 
 pref("mail.server.default.port", -1);
+pref("mail.server.default.offline_support_level", -1);
 pref("mail.server.default.leave_on_server", false);
 pref("mail.server.default.download_on_biff", false);
 pref("mail.server.default.check_time", 10);

modules/libpref/src/init/mailnews.js

@@ -259,6 +259,7 @@ pref("mail.collect_email_address_size_limit", 700);
 pref("mail.default_sendlater_uri","mailbox://nobody@Local Folders/Unsent Messages");
 
 pref("mail.server.default.port", -1);
+pref("mail.server.default.offline_support_level", -1);
 pref("mail.server.default.leave_on_server", false);
 pref("mail.server.default.download_on_biff", false);
 pref("mail.server.default.check_time", 10);