MFC r294891:

Require /sbin/mount_cd9660 when running the cd9660 tests

In some cases the test system might not have mount_cd9660(8). Don't
implicitly rely on it while testing cd9660 support; explicitly rely
on it

MFC r289739,r289743,r289897,r289901:

r289739:

Correctly reintroduce the rudimentary smoke tests I botched up
in r289684

Sponsored by: EMC / Isilon Storage Division

r289743:

Revise "create_test_inputs" to simplify the file structure as
these testcases don't need to be nested as much as bin/ls/ls_tests.sh
do when verifying ls -a, ls -A, etc. This allows the tests to make
all paths relative to the top of the temporary directory instead of
always tacking on $ATF_TMPDIR, thus complicating things unnecessarily

Create non-empty files in create_test_inputs as well now, similar to
create_test_inputs2 in bin/ls/ls_tests.sh

Compare the input files to the output file contents using diff where
possible:
- Skip over the fifo comparison for now because it always fails
- Skip over the symlink comparison on cd9660 because it always fails
today

Sponsored by: EMC / Isilon Storage Division

r289897:

Add more cd9660/FFS makefs testcases

General changes:
- Parameterize out the mount command.
- Use mtree to verify the contents of an image (check_image_contents) instead
of using diff (diff verifies content, but not file metadata).
- Move common logic out to functions (common_cleanup, mount_image,
check_image_contents)
- Add stub testcases for makefs -D (crashes with SIGBUS, similar to bug # 192839)
- Add a note about the ISO-9660 and rockridge specs
- Add testcases that exercise:
-- Creating disk images from an mtree and multiple directories.
-- -F flag use (not really an extensive testcase right now)

cd9660-specific test changes:

- Remove an XXX comment about symlinks; I forgot that non-rockridge images turn
symlinks into hardlinks.
- Add testcases that exercise:
-- -o allow-deep-trees
-- -o allow-max-name stub testcase (doesn't seem to be implemented in makefs)
-- -o preparer (existence in image; not conformance to spec)
-- -o publisher (existence in image; not conformance to spec)
-- -o rockridge (basic)

Sponsored by: EMC / Isilon Storage Division

r289901:

Remove an ls -l I was using for debugging

Sponsored by: EMC / Isilon Storage Division