Add option to sleep, not hibernate

Add the option for some users (like me) who either don't use swap or
don't have much of it, and so aren't allowed to hibernate by the kernel.

Instead of telling the kernel to suspend then hibernate, just suspend.

.local/bin/sysact

@@ -5,6 +5,7 @@
 # For systemd-based systems.
 case "$(readlink -f /sbin/init)" in
 	*systemd*)
+	slp="systemctl suspend -i"
 	hib="systemctl suspend-then-hibernate -i"
 	shut="systemctl poweroff -i"
 	reb="systemctl reboot -i";;
@@ -14,6 +15,7 @@ cmds="\
 🔒 lock		slock
 🚪 leave dwm	kill -TERM $(pgrep -u $USER "\bdwm$")
 ♻ renew dwm	kill -HUP $(pgrep -u $USER "\bdwm$")
+💤 sleep	slock ${slp:-loginctl suspend -i}
 🐻 hibernate	slock ${hib:-loginctl suspend-then-hibernate -i}
 🔃 reboot	${reb:-loginctl reboot -i}
 🖥 shutdow	${shut:-systemctl poweroff -i}