Notes for spring - reproducible builds result

Version annotated: 100.0+dfsg-2
Identified issues:
Identifier: timestamps_in_zip
Description Zip archives stores mtimes. Most often of files generated during
the build.
Identifier: different_due_to_umask
Description Files have varying permissions because of different umasks.

Our notes about issues affecting packages are stored in notes.git and are targeted at packages in Debian in 'unstable/amd64' (unless they say otherwise).