MINOR static publisher cache debugging (from r84871)

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@89156 467b73ca-7a2a-4603-9d3b-597d59a354a9

static-main.php

@@ -14,6 +14,7 @@
  */
 
 $cacheOn = true;
+$cacheDebug = false;
 $hostmapLocation = '../subsites/host-map.php';
 
 if ($cacheOn) {
@@ -38,10 +39,12 @@
 	} elseif (file_exists('../cache/'.$cacheDir.$file.'.php')) {
 		header('X-cache: hit at '.date('r'));
 		include_once '../cache/'.$cacheDir.$file.'.php';
+		if ($cacheDebug) echo "<h1>File was cached</h1>";
 	} else {
 		header('X-cache: miss at '.date('r') . ' on ' . $cacheDir . $file);
 		// No cache hit... fallback!!!
 		include 'main.php';
+		if ($cacheDebug) echo "<h1>File was !NOT! cached</h1>";
 	}
 } else {
 	include 'main.php';