GNU coding standards. Remove --license. * gnulib.modules: Add version-etc-fsf. * doc/tar.texi: Document the change. * lib/.cvsignore: Add version-etc-fsf.c, version-etc.c, version-etc.h. * scripts/Makefile.am (SED_CMD): Update PAKCAGE_NAME, not PACKAGE. * scripts/backup.in: Remove --license. Change --version to conform to GCS. * scripts/restore.in: Likewise. * scripts/backup.sh.in (license): Output briefer license in the style of coreutils, for consistency with other changes. * src/tar.c: Include <version-etc.h>. (LICENSE_OPTION): Remove. (options): Remove --license. (license): Remove. (parse_opt): Use version_etc instead of rolling it ourselves. Remove --license. * tests/version.at (tar --version): Check only the first line of output.
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