stage-2-init: create /var/lib and /var/db at boot, so some modules that create user home folders here don't fail
Merge pull request #262 from offlinehacker/fix/stage_2_lib_var_db

stage-2-init: create /var/lib and /var/db at boot, so some modules that create user home folders here don't fail
Merge remote-tracking branch 'official/master'
Added support for -I flag to nixos-install
Merge remote-tracking branch 'official/master'