Accept symbolic links as mounting scripts in the Docker image

[jesusvico]

Checklist

• My issue is specific & actionable.
• I am not suggesting a protocol enhancement.
• I have searched on the issue tracker for my issue.

Description

Now, only regular files are accepted as valid mounting scripts in the Docker image.

# /kubo/bin/container_daemon

#...

find /container-init.d -maxdepth 1 -type f -iname '*.sh' -print0 | sort -z | xargs -n 1 -0 -r container_init_run

This could be fixed with the following change:

find /container-init.d -maxdepth 1 \( -type f -o -type l \) -iname '*.sh' -print0

When using Kubernetes, ConfigMaps are mounted as symbolic links. Because of this, I cannot easily use the mounting script functionality.