dirstate: report bad subdirectories as match.bad, not just a warning (BC)
This seems simpler and more correct.
The only test coverage for this is test-permissions.t when it says:
dir: Permission denied
Minimal hgk check
$ echo "[extensions]" >> $HGRCPATH
$ echo "hgk=" >> $HGRCPATH
$ hg init repo
$ cd repo
$ echo a > a
$ hg ci -Am adda
adding a
$ hg debug-cat-file commit 0
tree a0c8bcbbb45c
parent 000000000000
author test 0 0
revision 0
branch default
phase draft
adda
$ cd ..