A real puzzler: ANY way to recover?

["David F. Skoll" <dfs@xxxxxxxxxxxxxxxxxx>]

Hi,

Supposing someone stupidly did this:

	UPDATE pg_database SET datallowconn = false;

and then closed all the connections to the server.

Is there any way to recover short of nuking everything and
restoring from a backup dump? :-(

Regards,

David.