1.0.29.11: one more one more DIRECTORY regressions

1.0.29.11: one more one more DIRECTORY regressions

* (DIRECTORY "X*") should not match directories with dotted names.

* Get rid of the KLUDGE to make up a directory component from pathname
  name and type, which was a source of inconsistencies between
  handling files and directories. Instead make MAP-DIRECTORY
  :DIRECTORIES :AS-FILES map over directory entries with
  filename-style pathnames, which allows us to share the matching
  logic between the two nicely.