licence: remove references to old FSF address Bug: https://bugs.freedesktop.org/show_bug.cgi?id=57206

LICENSE.LGPL2.1: update license Update the license with the copy found on http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt

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.