v5.4.6
tuklib_integer: Fix typo discovered by codespell.
Bump version and soname for 5.4.6.
xz, xzdec, lzmainfo: Use tuklib_attr_noreturn.
xzdiff: Add support for .lz files.
xz: Update website URLs in the man pages.
Build: Prepare to support Automake's subdir-objects.