This fixes handling of "." and "..".

This requires access to files in both host and grub image, so
implementing as separate test unit instead of script test was
more easy.

Tests file access with all filters enabled. It does it both for local
and network access, due to regression in signature checking over network.

This includes all files in distribution to not depend on existence
of compression tools and gpg. Test preloads all required modules to
avoid having to provide signatures for them.

Still not implemented is file offset filter (is not available in grub
script, needs extra module)

Add $(BUILD_EXEEXT) to ensure files are removed. Also add CLEANFILES where
appropriate.

	in separate root.

grub-core/osdep/aros/config.c to extra_dist.
* conf/Makefile.extra-dist (EXTRA_DIST): Add docs/autoiso.cfg,
docs/osdetect.cfg, grub-core/gnulib-fix-null-deref.diff,
grub-core/gnulib-fix-width.diff, grub-core/gnulib-no-abort.diff, and
grub-core/gnulib-no-gets.diff.

	quite some time locally. Most of the test require root so they are
	skipped when run without necessarry privelegies.

	the function of these files exceeds what can be sanely handled in shell
	in posix-comaptible way. Also writing it in C extends the functionality
	to non-UNIX-like OS and minimal environments.

	on target_os.

	relpath.c from getroot.c as it's common between unix and haiku
	but otherwise haiku doesn't use any functions from unix getroot.c.

	* osdep/unix/exec.c: ... here. Add few additional exec_* variants.

	* util/render-label.c: ... here.

	* util/render-label.c: ... here.

	* grub-core/commands/tr.c: New file.
	* grub-core/Makefile.core.def: Build rules for new module.

	* tests/grub_cmd_tr.in: New test.
	* Makefile.util.def: Build rules for new test.

	* util/editenv.c (grub_util_create_envblk_file): ... to here.

	* util/mkimage.c: ... here.

	grub-core/osdep/blocklist.c and add windows implementation since
	generic version doesn't work on NTFS on Windows due to aggressive
	unflushable cache.

	files.

	fix in this fuction console and argument charset as well.

	* grub-core/osdep/linux/ofpath.c: ..here, split stub into ...
	* grub-core/osdep/basic/ofpath.c: ..here.

	* util/getroot_linux.c: ... here. Make all functions static.