add update-ab command to luakit

.config/luakit/cmds.lua

@@ -0,0 +1,17 @@
+local lfs = require "lfs"
+
+require("modes").add_cmds {
+    {
+        ":update-ab",
+        [[Update the adblocker lists]],
+        function(w)
+            local home = os.getenv "HOME"
+
+            lfs.mkdir(home .. "/.local/share/luakit/adblock/")
+
+            require("downloads").add("https://easylist.to/easylist/easylist.txt", {
+                filename = home .. "/.local/share/luakit/adblock/easylist.txt",
+            })
+        end,
+    },
+}

.config/luakit/userconf.lua

@@ -1 +1,2 @@
+require "cmds"
 require "usersettings"