+1 vote. And while developing this, perhaps you can think about a simpler setup. Instead of having rules and settings like "URL Rules" and "Equivalent subdomains" let me as user simply have the possibility to link any entry to another. So if I add a new site let me have the option to either (1) fill it it and/or generate (as nowadays) or (2) select another entry from the list to link to (and hence use the username/pwd from that entry).
How difficult can it be, a simple 1-to-many relationship