sylabs/singularity: SingularityCE 3.9.0 Release Candidate 3

This is the third release candidate for the upcoming SingularityCE 3.9.0. We'd be grateful for all testing, bug reports, and comments, as we look forward to a stable 3.9.0 release. Please carefully review the release notes below, and refer to the 'master branch (unreleased)' documentation at https://sylabs.io/docs/ This is a release candidate for SingularityCE 3.9.0 Changed defaults / behaviours The behaviour of the allow container directives in singularity.conf has been modified, to support more intuitive limitations on the usage of SIF and non-SIF container images. If you use these directives, you may need to make changes to singularity.conf to preserve behaviour. A new allow container sif directive permits or denies usage of unencrypted SIF images, irrespective of the filesystem(s) inside the SIF. The allow container encrypted directive permits or denies usage of SIF images with an encrypted root filesystem. The allow container squashfs/extfs directives in singularity.conf permit or deny usage of bare SquashFS and EXT image files only. The effect of the allow container dir directive is unchanged. New features Perform concurrent multi-part downloads for library:// URIs. Uses 3 concurrent downloads by default, and is configurable in singularity.conf or via environment variables. Bug fixes Ensure invalid values passed to config global --set cannot lead to an empty configuration file being written. Thanks / Reporting Bugs Thanks to our contributors for code, feedback and, testing efforts! As always, please report any bugs to: https://github.com/sylabs/singularity/issues/new If you think that you've discovered a security vulnerability please report it to: security@sylabs.io Have fun! Downloads Please use the singularity-ce-3.9.0-rc.2.tar.gz download below to obtain and install SingularityCE 3.9.0-rc.3. The GitHub auto-generated 'Source Code' downloads do not include required dependencies etc