freeze (http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git) and
standby (https://bugs.freedesktop.org/show_bug.cgi?id=57793) as suspend modes
-* When shutdown.target is queued begin with an asynchronous sync()?
-
* introduce ntp.service (or suchlike) as symlink that is used to arbitrate between various NTP implementations
* deal with sendmail/postfix exclusivity