- attributes function now runs via core in setup_ak and reset_ak, but only if it exists, allowing more easy removal of it for setups with no ramdisk changes (so all should now remove the awkward `&& attributes` call from anykernel3.sh, see next commit)
- for multi-partition zips with multiple ramdisks requiring different files, multiple attributes functions may now be specified, either redefine attributes() in anykernel.sh for the next partition, or add a different function for each partition, e.g. boot_attributes() and vendor_boot_attributes()
- fix block=auto multi-partition setup creating an "auto-files" directory instead of final found block, e.g. "init_boot-files"