ikiwiki now has a `disable` hook. Should the po plugin remove the po
files from the source repository when it has been disabled?

> pot files, possibly, but the po files contain work, so no. --[[Joey]] 

>> I tried to implement this in my `po-disable` branch, but AFAIK, the
>> current rcs plugins interface provides no way to tell whether a
>> given file (e.g. a POT file in my case) is under version control;
>> in most cases, it is not, thanks to .gitignore or similar, but we
>> can't be sure. So I just can't decide it is needed to call
>> `rcs_remove` rather than a good old `unlink`. --[[intrigeri]]
