--------------------------------------------------------------------------------------------------------> -CURRENT (8.0)
                   \                       \                    \                       \
                    \                       \                    \                       \
                     \                       \                    \                       \
                      \ 4.x (EOL)             \ 5.x (EOL)          \ 6.x                   \ 7.x
                      /\                      /\                   /\                      /
                     /  \                    /  \                 /  \                    /
              (4.10)    /              (5.4)    /            (6.2)   /               (7.0) RC
                       /                       /                    /              
                 (4.11)                   (5.5)                (6.3) RC