awesomerc: Use rules to set the default position instead of "manage"

This avoid a conflict when rules try to set overlapping geometry.

awesomerc.lua

@@ -430,7 +430,10 @@ awful.rules.rules = {
                      focus = awful.client.focus.filter,
                      raise = true,
                      keys = clientkeys,
-                     buttons = clientbuttons } },
+                     buttons = clientbuttons,
+                     placement = awful.placement.no_overlap+awful.placement.no_offscreen
+     }
+    },
 
     -- Floating clients.
     { rule_any = {
@@ -472,17 +475,13 @@ awful.rules.rules = {
 -- {{{ Signals
 -- Signal function to execute when a new client appears.
 client.connect_signal("manage", function (c)
-    if not awesome.startup then
     -- Set the windows at the slave,
     -- i.e. put it at the end of others instead of setting it master.
-        -- awful.client.setslave(c)
+    -- if not awesome.startup then awful.client.setslave(c) end
 
-        -- Put windows in a smart way, only if they do not set an initial position.
-        if not c.size_hints.user_position and not c.size_hints.program_position then
-            awful.placement.no_overlap(c)
-            awful.placement.no_offscreen(c)
-        end
-    elseif not c.size_hints.user_position and not c.size_hints.program_position then
+    if awesome.startup and
+      not c.size_hints.user_position
+      and not c.size_hints.program_position then
         -- Prevent clients from being unreachable after screen count changes.
         awful.placement.no_offscreen(c)
     end