For those wikipedias that /should/ be using the same
seems reasonable to me that they should have all of the scripts
symlinked to the scripts of the main wikipedia. Then, any
configurable variables could be exported by Apache as ENV variables.
By doing this, you avoid running a script to update things, a person
doesn't have to update them manually, and all of the apropriate
wikipedias will be running the same software...
That will work wonderfully up to the first time we make a software
update that requires a database change. In that case, we want to
make sure that the upgrade process incudes the database update, and
each one has to be done individually.