Follows-up 3a252efa: Update docs around $wgUseLocalMessageCache

MessageCache had its "local server" cache converted from file-based
to using APC. For installs without APC, this setting no longer
does anything.

Change-Id: I1e284b56cadaa0206ca60ecdb6a55360e1fa1935

diff --git a/includes/DefaultSettings.php b/includes/DefaultSettings.php
index bf6e245..36fd358 100644 (file)
--- a/includes/DefaultSettings.php
+++ b/includes/DefaultSettings.php
@@ -2358,8 +2358,15 @@ $wgMemCachedPersistent = false;
 $wgMemCachedTimeout = 500000;
 
 /**
- * Set this to true to make a local copy of the message cache, for use in
- * addition to memcached. The files will be put in $wgCacheDirectory.
+ * Set this to true to maintain a copy of the message cache on the local server.
+ *
+ * This layer of message cache is in addition to the one configured by $wgMessageCacheType.
+ *
+ * The local copy is put in APC. If APC is not installed, this setting does nothing.
+ *
+ * Note that this is about the message cache, which stores interface messages
+ * maintained as wiki pages. This is separate from the localisation cache for interface
+ * messages provided by the software, which is configured by $wgLocalisationCacheConf.
  */
 $wgUseLocalMessageCache = false;