Apptainer 1.3.6 released

[Dave Dykstra]

Apptainer 1.3.6 is now available:
https://github.com/apptainer/apptainer/releases/tag/v1.3.6

This is a bug fix affecting sandbox containers on GPFS. Please build
and test it in your environment and report problems to
https://github.com/apptainer/apptainer/issues

Questions can be raised at dis...@apptainer.org or on the Apptainer
#general Slack channel.

Apptainer 1.3.6 Release Notes:

- Avoid using kernel overlayfs when the lower layer is a sandbox on an
incompatible filesystem type such as GPFS or Lustre. For those cases
use fuse-overlayfs instead. This fixes a regression introduced in
1.3.0. The regression didn't much impact Lustre because kernel
overlayfs refused to try to use it and Apptainer proceeded to use
fuse-overlayfs anyway, but with GPFS the kernel overlayfs allowed
mounting but returned stale file handle errors.

Dave