Change: Redesign backend error handling to improve reliability Restic now downloads pack files in large chunks instead of using a streaming download. This prevents failures due to interrupted streams. The `restore` command now also retries downloading individual blobs that cannot be retrieved. HTTP requests that are stuck for more than two minutes while uploading or downloading are now forcibly interrupted. This ensures that stuck requests are retried after a short timeout. Attempts to access a missing file or a truncated file will no longer be retried. This avoids unnecessary retries in those cases. All other backend requests are retried for up to 15 minutes. This ensures that a temporarily interrupted network connections can be tolerated. If a download yields a corrupt file or blob, then the download will be retried once. Most parts of the new backend error handling can temporarily be disabled by setting the environment variable `RESTIC_FEATURES=backend-error-redesign=false`. Note that this feature flag will be removed in the next minor restic version. https://github.com/restic/restic/issues/4627 https://github.com/restic/restic/issues/4193 https://github.com/restic/restic/pull/4605 https://github.com/restic/restic/pull/4792 https://github.com/restic/restic/issues/4515 https://github.com/restic/restic/issues/1523 https://github.com/restic/restic/pull/4520 https://github.com/restic/restic/pull/4800 https://github.com/restic/restic/pull/4784