readahead: wipe out readahead

man: document systemd-vconsole-setup.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.

units: start vconsole-setup only if there's actually a virtual console device

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.

units: drop unnecessary 'StandardOutput=syslog' DefaultStandardOutput is syslog anyway. There's no reason to assume that the administrator would want these units to be excluded when he configures a different DefaultStandardOutput.

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

syslog: enable kmsg bridge by default and enable syslogging for early boot services

units: make sure we run all early boot units before entering basic.target

units: add readahead unit files

units: always enable random-seed, module-load, vconsole

vconsole: add new utility to initialize the virtual console