mysql 5.5.23 merge

sql/rpl_rli.h

@@ -202,6 +202,13 @@ public:
   ulonglong log_space_limit,log_space_total;
   bool ignore_log_space_limit;
 
+  /*
+    Used by the SQL thread to instructs the IO thread to rotate 
+    the logs when the SQL thread needs to purge to release some
+    disk space.
+   */
+  bool sql_force_rotate_relay;
+
   /*
     When it commits, InnoDB internally stores the master log position it has
     processed so far; the position to store is the one of the end of the