Hi,
I don't see anything about "group=0" in wmii documentations. Where documentation for current wmii. if it exists, can be found? Or read wmii sources is the only way to learn this?)
I think the /rules file is described in the man page of wmii, but IIRC the move of all rules into /rules instead of /colrules and /tagrules is not finished yet. This may explain the missing documentation.
As I said earlier, I am not sure if this feature is in 3.9.2 already. You may want to browse the changesets to see when it was added.
-- Thomas Dahms