Bug#882691: Patch for local_settings.py is world-readable, expose password to local users

[Alexandre Rossi]

Hi,

Please find a fix for this in my PR.

https://salsa.debian.org/debian-graphite-team/graphite-web/-/merge_requests/4/diffs?commit_id=f33e706201af428ac88066de0b52c523f805854e

Thanks,

Alex