Improvements on the session handling

[jvillafanez]

WHAT Needs to be Documented?

New config options added in owncloud/core#39916 . Some old options might need an update for clarification

WHERE Does This Need To Be Documented (Link)?

WHY Should This Change Be Made?

(Optional) What Type Of Content Change Is This?

• New Content Addition
• Old Content Deprecation
• Existing Content Simplification
• Bug Fix to Existing Content

(Optional) Which Manual Does This Relate To?

• Admin Manual
• Developer Manual
• User Manual
• Android
• iOS
• Branded Clients
• Desktop Client
• Other

Hopefully, owncloud/core#39916 (comment) and the information in the config.sample.php file is enough, if not please ask.

This is expected to be in 10.9.2

[mmattel]

Fixed via #301 (Config To Docs run)