Bug 1729501

.`ReaR` updates RHEL 8.2 introduces a number of updates to the Relax-and-Recover (`ReaR`) utility. The build directory handling has been changed. Previously, the build directory was kept in a temporary location in case `ReaR` encountered a failure. With this update, the build directory is deleted by default in non-interactive runs to prevent consuming disk space. The semantics of the `KEEP_BUILD_DIR` configuration variable has been enhanced to include a new `errors` value. You can set the `KEEP_BUILD_DIR` variable to the following values: * `errors` to preserve the build directory on errors for debugging (the previous behavior) * `y` (`true`) to always preserve the build directory * `n` (`false`) to never preserve the build directory The default value is an empty string with the meaning of `errors` when `ReaR` is being executed interactively (in a terminal) and `false` if `ReaR` is being executed non-interactively. Note that `KEEP_BUILD_DIR` is automatically set to `true` in debug mode (`-d`) and in debugscript mode (`-D`); this behavior has not been changed. Notable bug fixes include: * Support for NetBackup 8.0 has been fixed. * `ReaR` no longer aborts with a bash error similar to `xrealloc: cannot allocate` on systems with a large number of users, groups, and users per group. * The `bconsole` command now shows its prompt, which enables you to perform a restore operation when using the Bacula integration. * `ReaR` now correctly backs up files also in situations when the `docker` service is running but no `docker` root directory has been defined, or when it is impossible to determine the status of the `docker` service. * Recovery no longer fails when using thin pools or recovering a system in Migration Mode. * Extremely slow rebuild of `initramfs` during the recovery process with LVM has been fixed. * `ReaR` now creates a working bootable ISO image on the AMD and Intel 64-bit architectures when using the UEFI bootloader. Booting a rescue image in this setup no longer aborts in Grub with the error message `Unknown command 'configfile' (...) Entering rescue mode...`. Support for GRUB_RESCUE in this setup, which previously could fail due to missing XFS filesystem support, has also been fixed.