linux: Update to 3.4.83

(cherry picked from commit c0f3f6e3965ef9a5dfc2eb0a38344a370f050bd2)
flashplayer: Add license field

(cherry picked from commit 5a807eaedbb1806b6da460a9a0469f7d76432f26)
switch-to-configuration: Don't try to start masked units

(cherry picked from commit 09c14cd8aa7df29d5c752f650710b0928fce0317)
libpng: update 1.6.9 -> .10 to fix CVE-2014-0333

(cherry picked from commit f5464c298232c179508ee77ff35a187393c71264)
udisks1: bump to fix CVE-2014-0004

Also systemd unit is now installed.
Thanks to nixpkgs monitor again, as for all my CVE commits.

(cherry picked from commit 344f2e6518ebcc1d07cff19df49ed2f960680087)
udisks2: update from 2.1.1 to 2.1.3, potentially fixes CVE-2014-0004

(cherry picked from commit 0ffbfd38bfe820579ac4c8ed37676813179e2608)
ImageMagick: update to 6.8.8-7

Fixes CVE-2014-{1947,1958,2030}.

(cherry picked from commit 5d14048867ccc4a05b86875573e64a66c4382144)