Add system exit dialog.

.config/i3/i3exit

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+case "$1" in
+lock)
+    i3lock
+    ;;
+logout)
+    i3-msg exit
+    ;;
+suspend)
+    i3lock && systemctl suspend
+    ;;
+hibernate)
+    i3lock && systemctl hibernate
+    ;;
+reboot)
+    systemctl reboot
+    ;;
+shutdown)
+    systemctl poweroff
+    ;;
+*)
+    echo "Usage: $0 [lock|logout|suspend|hibernate|reboot|shutdown]"
+    exit 2
+    ;;
+esac
+
+exit 0