Improvements to the script loader: allows plugins to queue scripts for the front end head and footer, adds hooks for server side caching of compressed scripts, adds support for ENFORCE_GZIP constant (deflate is used by default since it's faster), see #8628, fixes #8884

git-svn-id: https://develop.svn.wordpress.org/trunk@10442 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/includes/template.php

@@ -3395,7 +3395,7 @@ function screen_icon($name = '') {
 }
 
 /**
- * Test support for compressed JavaScript and CSS
+ * Test support for compressing JavaScript from PHP
  *
  * Outputs JavaScript that tests if compression from PHP works as expected
  * and sets an option with the result. Has no effect when the current user
@@ -3406,7 +3406,7 @@ function screen_icon($name = '') {
  */
 function compression_test() {
 ?>
-	<script type="text/javascript" src="load-scripts.php?test=1"></script>
+	<script type="text/javascript" src="load-scripts.php?test=1<?php echo ( defined('ENFORCE_GZIP') && ENFORCE_GZIP ) ? '&c=gzip' : ''; ?>"></script>
 	<script type="text/javascript">
 	/* <![CDATA[ */
 	(function() {