[atlas] Altas switching to "RIPE NCC Access"

Dear Atlas people,

Tomorrow during the day we'll switch RIPE Atlas to use RIPE NCC Access, 
our Single-Sing-On mechanism.

Maintenance will happen during our working hours (9-5, Amsterdam time), 
and it will last between 1 and 3 hours.

During this, Atlas login will be disabled.
The Atlas web site will have limited functionality.

After the completed maintenance, the "log in" link on Atlas web site 
will be re-directed to the RIPE NCC Access log-in page.

For other possible outcomes on this migration,
please read Robert's article:
https://labs.ripe.net/Members/kistel/preparing-ripe-atlas-for-ripe-ncc-access

Single-Sign-On functionality will enable us to share Atlas with the 
users of other RIPE NCC services; it will make the user-experience 
smoother for everyone who is accessing multiple services from the RIPE 
NCC (such as LIR Portal, RIPE Labs or RIPEstat), and will enable many 
new personalized features in the future.

If you have any questions, please let us know.

Thank you,
Vesna