readahead: wipe out readahead

units: order systemd-tmpfiles-clean.service after time-sync.target That way, on systems lacking an RTC we don't false start removing aged files too early.

units: remove conditions from systemd-tmpfiles-setup There's no point in conditionalizing systemd-tmpfiles at boot, since we ship tmpfiles snippets ourselves, hence they will always trigger anyway. Also, there's no reason to pull in local-fs.target from the service, hence drop that.

man: link systemd-tmpfiles-setup-dev.service

units: introduce new Documentation= field and make use of it everywhere This should help making the boot process a bit easier to explore and understand for the administrator. The simple idea is that "systemctl status" now shows a link to documentation alongside the other status and decriptionary information of a service. This patch adds the necessary fields to all our shipped units if we have proper documentation for them.

relicense to LGPLv2.1 (with exceptions) We finally got the OK from all contributors with non-trivial commits to relicense systemd from GPL2+ to LGPL2.1+. Some udev bits continue to be GPL2+ for now, but we are looking into relicensing them too, to allow free copy/paste of all code within systemd. The bits that used to be MIT continue to be MIT. The big benefit of the relicensing is that closed source code may now link against libsystemd-login.so and friends.

binfmt, modules-load, sysctl, tmpfiles: add missing ConditionDirectoryNotEmpty=

tmpfiles: move binary to /bin to make it publicly available

units: move a couple of units from base.target to sysinit.target

tmpfiles: integrate kay's directory cleanup code and otherwise beef up tmpfiles quite a bit