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.

t/makedir.do

@@ -1,2 +1,3 @@
-[ -e "$1" ] && rmdir $1
+rm -rf "$1"
 mkdir $1
+echo $$ >>makedir.log