add default binding to restart awesome

awesome.1.txt

@@ -117,6 +117,8 @@ DEFAULTS KEY BINDINGS
     Kill client.
 *Mod4 \+ Shift \+ q*::
     Quit awesome.
+*Mod4 \+ Control \+ r*::
+    Restart awesome.
 *Mod4 + 0-9*::
     Switch to tag 1-9, 0 for all.
 *Mod4 \+ Control \+ 0-9*::

awesomerc

@@ -325,7 +325,13 @@ keys
         key = "q"
         command = "quit"
     }
-
+    key
+    {
+        modkey = {"Mod4", "Control"}
+        key = "r"
+        command = "exec"
+        arg = "awesome"
+    }
     key
     {
        modkey = {"Mod4"}
@@ -339,7 +345,6 @@ keys
         keylist = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }
         arglist = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }
     }
-
     key
     {
         modkey = {"Mod4", "Control"}