Update The Automatic Updater manual page with current information
Fix typos and clean up wording
Update autoupdate.rst

Typo correction
Correct Linux section on disabling update notifications
Merge branch 'updater' of https://github.com/owncloud/mirall into updater
Update autoupdate.rst

Corrected configuration file location
Merge pull request #2419 from owncloud/updater

Update and correct doc/autoupdate.rst