slock is a simple X display locker.

This build applies the DPMS patch by default:
http://tools.suckless.org/slock/patches/dpms

While the screen is locked, the monitor is powered off after a short
idle timeout (monitortime in config.h). This saves power on laptops
and does no harm on desktops, where it simply blanks the display.

Any additional patches dropped into the patches/ directory are applied
automatically at build time.