[support] Server maintenance on monday 11/26

[Martin André]

Hello,

we will stop our main server for maintenance on monday 11/26.
The following service will be unavailable during this period:
- Mailing lists
- www.nautilus6.org and software.nautilus6.org
- Mobility service
- Debian and Ubuntu package repositories

We will do our best to have everything working as soon as possible.

Thank you for your understanding,