lua: do delete stdin/stdout client

This fixes an endless loop when piping commands to stdin with echo
for example

share/lua/intf/modules/host.lua

@@ -125,14 +125,17 @@ function host()
         return vlc.win.console_read()
     end
 
-    local function del_client( client, nostdioerror )
-        --client:send("Cleaning up.\r\n")
-        if client.type == client_type.stdio then
-            if not nostdioerror then
-                client:send( "Cannot delete stdin/stdout client.\n" )
+    local function del_client( client )
+        if not clients[client] then
+            vlc.msg.err("couldn't find client to remove.")
+            return
         end
-        elseif clients[client] then
-            if client.type == client_type.net
+
+        if client.type == client_type.stdio then
+            h:broadcast("Shutting down.\r\n")
+            vlc.msg.info("Requested shutdown.")
+            vlc.misc.quit()
+        elseif client.type == client_type.net
         or client.type == client_type.telnet then
             if client.wfd ~= client.rfd then
                 vlc.net.close( client.rfd )
@@ -140,9 +143,6 @@ function host()
             vlc.net.close( client.wfd )
         end
         clients[client] = nil
-        else
-            vlc.msg.err("couldn't find client to remove.")
-        end
     end
 
     local function switch_status( client, s )
@@ -318,7 +318,9 @@ function host()
 
     local function destructor( h )
         for _,client in pairs(clients) do
-            client:del(true)
+            if client.type ~= client_type.stdio then
+                client:del()
+            end
         end
     end