Re: pg_ls_tmpdir to show directories and shared filesets (and pg_ls_*)

The cfbot is failing testing this patch. It seems... unlikely given
the nature of the patch modifying an admin function that doesn't even
modify the database that it should be breaking a streaming test.
Perhaps the streaming test is using this function in the testing
scaffolding?

[03:19:29.564] # Failed test 'regression tests pass'
[03:19:29.564] # at t/027_stream_regress.pl line 76.
[03:19:29.564] # got: '256'
[03:19:29.564] # expected: '0'
[03:19:29.564] # Looks like you failed 1 test of 5.
[03:19:29.565] [03:19:27] t/027_stream_regress.pl ..............
[03:19:29.565] Dubious, test returned 1 (wstat 256, 0x100)
[03:19:29.565] Failed 1/5 subtests