Stomp queue restructuring for mass scalability:

- Multiplexing queues into groups and for multiple sites.
- Sharing vs breakout configurable per site and per queue via $config['queue']['breakout']
- Detect how many times a message is redelivered, discard if it's killed too many daemons
 - count configurable with $config['queue']['max_retries']
 - can dump the items to files in $config['queue']['dead_letter_dir']

Queue daemon memory & resource leak fixes:
- avoid unnecessary reconnections to memcached server (switch persistent connections back in on second initialization, assuming it's child process)
- monkey-patch for leaky .ini loads in DB_DataObject::databaseStructure() - was leaking 200k per active switch
- applied leak fixes to Status_network as well, using intermediate base Safe_DataObject for both it and Memcache_DataObject

Misc queue fixes:
- correct handling of child processes exiting due to signal termination instead of regular exit
- shutdown instead of infinite respawn loop if we're already past the soft memory limit at startup
- Added --all option for xmppdaemon... still opens one xmpp connection per site that has xmpp active

Cache updates:
- add Cache::increment() method with native support for memcached atomic increment

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/iomanager.php b/lib/iomanager.php
index ee2ff958b..217599a6d 100644
--- a/lib/iomanager.php
+++ b/lib/iomanager.php
@@ -59,9 +59,10 @@ abstract class IoManager
      * your manager about each site you'll have to handle so you
      * can do any necessary per-site setup.
      *
-     * @param string $site target site server name
+     * The new site will be the currently live configuration during
+     * this call.
      */
-    public function addSite($site)
+    public function addSite()
     {
         /* no-op */
     }