Renamed all .inc PHP files to .php and replaced all .inc calls

Because .inc style is deprecated and also dangerious as often not setup
correctly on the server all .inc files have been renamed to .php files.

All internall calls have been udpated.

www/includes/admin_header.php

@@ -10,7 +10,7 @@
 //------------------------------ variable init start
 // for dev test we set full error reporting; writes everything, except E_ERROR into logs/php_error-<day>.log
 if ($DEBUG_ALL && $ENABLE_ERROR_HANDLING) {
-	include BASE.LIBS."Error.Handling.inc";
+	include BASE.LIBS."Error.Handling.php";
 }
 // predefine vars
 $lang = '';

www/includes/admin_set_paths.php

@@ -39,7 +39,7 @@ $FORM_NAME = !isset($FORM_NAME) || !$FORM_NAME ? str_replace(".php", "", $cms->p
 $L_TITLE = ucfirst(str_replace('_', ' ', $cms->getPageName(1))).(defined(G_TITLE) ? ' - '.G_TITLE : '');
 // strip tpl and replace it with inc
 // php include file per page
-$cms->INC_TEMPLATE_NAME = str_replace(".tpl", ".inc", $CONTENT_INCLUDE);
+$cms->INC_TEMPLATE_NAME = str_replace(".tpl", ".php", $CONTENT_INCLUDE);
 // javascript include per page
 $cms->JS_TEMPLATE_NAME = str_replace(".tpl", ".js", $CONTENT_INCLUDE);
 // css per page