I am trying to instal an open Wiki which will have transcludes from a 'closed' wiki maintained on the same server. In fact I'm trying this idea twice on a server (and a MYSQL database that already has one standard wiki installed.) I remembered that a Wiki some time ago allowed more that one installation by showing a specific MYSQL prefix options section in the install process. But the current 1.13.4 doesn;t have that install option, neither does 1.12.4. Both install with a standard option that needs a lot of work to avoid pages from different wikis showing up in all of them.
I had to go back to 1.11.2 to find the installation I need with specific prefixes - any reason this has been dropped from more recent versions??