>>9
The admin5:default credentials are added by the code when shadow.cgi is not present. After the initial setup phase a prudent admin will change the password to something more secure, so that random anons do not abuse the default password. If you got a shadow.cgi with a modified password, or if your shadow.cgi got corrupted for whatever reason, the easiest fix is to delete it, which will reenable the credentials from the readme.