Applied most of the patches from current upstream.
    
    - NOT included:
      - systemadm removal
      - /media, /tmp tmpfs changes
      - systemd-*.conf config files rename
      - "service: schedule JOB_RESTART from SERVICE_AUTO_RESTART state"
        possible regression, https://bugs.freedesktop.org/show_bug.cgi?id=45511
      - udev merge
      - big LGPL relicensing patch
      - MountAuto=, SwapAuto= options removal
      - use of Type=idle for gettys by default
      - JobNew/JobRemoved dbus API change
    - Fixes for reported BZs:
      - try-restart handling of units with scheduled jobs (#753586)
      - start requirement dependencies on "restart" (#802770)
      - systemd-tmpfiles did not preserve atime of subdirectories (#810257)
      - segfault in systemd-loginctl kill-session (#819142)
      - added shutdown inhibition support (#570594)
      - assertion failure in systemd-analyze (#701669)
      - bash-completion "Failed to issue method call" (#814966)
    - Switched to using git for prep. Allows the use of renaming patches.