minecraft-server: 1.7.5 -> 1.7.9

Signed-off-by: Austin Seipp <aseipp@pobox.com>
(cherry picked from commit ec13d61cbf3f55e9e20b2221ac41a554e0884be3)
lockdep: 3.14 -> 3.14.2

Signed-off-by: Austin Seipp <aseipp@pobox.com>
(cherry picked from commit 7faaa9e6daa79f40ae3725e97c463746d079f3ae)
nixos: refactor tarsnap module

The Tarsnap module is now far more flexible, allowing individual
archives with individual options to be specified at will, allowing
granular backup schedules, etc.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
(cherry picked from commit 9242ed1fe297daf144fd4034af95d4fb0f0e3fa9)