Confluence Upgrade 6.4.3 to 6.9.1

Items of interest: (click on the link for additional details)

Notes for 6.5
    Keep your site shipshape
    Small changes with a big impact
    Exclusive to Data Center

Notes for 6.6
    More European languages
    Deploy Confluence Data Center in Azure
    Restore administrator rights using recovery mode
    Get ready for the Confluence mobile app

Notes for 6.7
    Mentioning people just got easier (and faster)
    Confluence gets a fresh, new look
    More goodness

Notes for 6.8
    The Confluence Server mobile app is here!
    Request access is now 5 times better
    More goodness

Notes for 6.9
    More control over your editing experience
    IPv6 support
    Simpler proxy and HTTPS setup
    Elsewhere in the Confluence universe...