Issue with Config and opcode cache

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Hi,

When using an opcode cache, configuration files are cached.

So, after a configuration file is updated, its old content will be
served by cached until invalidated, or checked.

With Zend Opcache, default check delay is 2"

	opcache.revalidate_freq=2

And, it is common to have a greater value on production env.

The small patch attached should fix this (only for opcache, other
opcode caches such as XCache or deprecated APC are not handled)


Notice, this is just a quick fix, perhaps you could integrate the
feature in a different way, just want to raise the issue and a
possible fix.


Regards,
Remi.
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--- Horde/Config.php.old	2014-09-06 09:42:31.402451442 +0200
+++ Horde/Config.php	2014-09-06 09:57:15.473336313 +0200
@@ -301,7 +301,11 @@
             fwrite($fp, $php);
             fclose($fp);
             $GLOBALS['registry']->rebuild();
-            $GLOBALS['notification']->push(sprintf(Horde_Core_Translation::t("Successfully wrote %s"), Horde_Util::realPath($configFile)), 'horde.success');
+            $GLOBALS['notification']->push(sprintf(Horde_Core_Translation::t("Successfully wrote %s"), $rp = Horde_Util::realPath($configFile)), 'horde.success');
+
+            if (function_exists('opcache_invalidate') && opcache_invalidate($rp)) {
+                $GLOBALS['notification']->push(sprintf(Horde_Core_Translation::t("Successfully removed from cache %s"), $rp), 'horde.success');
+            }
             return true;
         }