was intentionally skipped to avoid complexity but enough people have
asked why it doesn't work that it's time to do something about it
turns out it wasn't that bad
* permission `.` grants dotfile visibility if user has `r` too
* `-ed` will grant dotfiles to all `r` accounts (same as before)
* volflag `dots` likewise
also drops compatibility for pre-0.12.0 `-v` syntax
(`-v .::red` will no longer translate to `-v .::r,ed`)