awful: add compatibility with old function names from util

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/init.lua.in

@@ -17,7 +17,29 @@ local titlebar = require("awful.titlebar")
 local util = require("awful.util")
 local widget = require("awful.widget")
 
+local ipairs = ipairs
+local unpack = unpack
+
 --- awful: AWesome Functions very UsefuL
 module("awful")
 
+local deprecated_functions =
+{
+    "color_strip_alpha",
+    "cycle",
+    "mkdir",
+    "spawn",
+    "pread",
+    "eval",
+    "escape",
+    "unescape"
+}
+
+for k, v in ipairs(deprecated_functions) do
+    _M[v] = function (...)
+        util.deprecate()
+        util[v](unpack(arg))
+    end
+end
+
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