* New $CFG->localcachedir setting useful for cluster nodes. Admins have to update X-Sendfile aliases if used.
* MS SQL Server drivers are now using NVARCHAR(MAX) instead of NTEXT and VARBINARY(MAX) instead of IMAGE,
this change should be fully transparent and it should help significantly with add-on compatibility.
+* The string manager classes were renamed. Note that they should not be modified or used directly,
+ always use get_string_manager() to get instance of the string manager.
+* The ability to use an 'insecure' rc4encrypt/rc4decrypt key has been removed.
+ * Use $CFG->debugdeveloper instead of debugging('', DEBUG_DEVELOPER).
+ * Use set_debugging(DEBUG_xxx) when changing debugging level for current request.
DEPRECATIONS:
Various previously deprecated functions have now been altered to throw DEBUG_DEVELOPER debugging notices