Remove special case for "dirname" -> "dirname/all"

It actually decreases readability of the .do files - by not making it
explicit when you're going into a subdir.

Plus it adds ambiguity: what if there's a dirname.do *and* a dirname/all?
We could resolve the ambiguity if we wanted, but that adds more code, while
taking out this special case makes *less* code and improves readability.
I think it's the right way to go.

minimal/do

@@ -73,9 +73,6 @@ _do()
 redo()
 {
 	for i in "$@"; do
-		if [ -e "$i/." ]; then
-			i="$i/all"
-		fi
 		_dirsplit "$i"
 		( cd "$dir" && _do "$dir" "$base" ) || exit $?
 	done