lock-system

Hey, is there a particular reason for the order of Linux commands? The way that it's currently set, it actually doesn't work for me. My workstation seems to have xdg-screensaver, but no-ops when I try to run the command. The cinnamon command works.

Adds support for the cinnamon screensaver interface. One thing I noticed, might be an idea for the future, is installed on several linux systems but not connected to the desktop, thus running does return but does not actually fire the lock command. Might be an idea to move it below the as a lower priority command.