Merge "Added deprecation comment to constant that when used throws deprecation exception"

diff --combined includes/Defines.php
index 46b0947,661acc3..46a3773
--- 1/includes/Defines.php
--- 2/includes/Defines.php
+++ b/includes/Defines.php
@@@ -54,12 -54,12 +54,12 @@@ define( 'DBO_COMPRESS', 512 )
   */
  define( 'DB_SLAVE', -1 );     # Read from the slave (or only server)
  define( 'DB_MASTER', -2 );    # Write to master (or only server)
- define( 'DB_LAST', -3 );     # Whatever database was used last
  /**@}*/
  
  # Obsolete aliases
  define( 'DB_READ', -1 );
  define( 'DB_WRITE', -2 );
+ define( 'DB_LAST', -3 ); # deprecated since 2008, usage throws exception
  
  
  /**@{
@@@ -227,7 -227,7 +227,7 @@@ define( 'MW_SUPPORTS_RESOURCE_MODULES'
  define( 'OT_HTML', 1 );
  define( 'OT_WIKI', 2 );
  define( 'OT_PREPROCESS', 3 );
 -define( 'OT_MSG' , 3 );  // b/c alias for OT_PREPROCESS
 +define( 'OT_MSG', 3 );  // b/c alias for OT_PREPROCESS
  define( 'OT_PLAIN', 4 );
  /**@}*/