Phase 2 of deprecation of functions in lib/deprecatedlib.php initially deprecated in 4.2

As per the Step 2. Final deprecation process, all functions in lib/deprecatedlib.php that were deprecated in 4.2 should be replaced with exceptions in 4.6.

This includes all functions in lib/deprecatedlib.php that say @deprecated since 4.2 (or earlier).

If any functions from this file do not have this comment but also need to be finally deprecated in 4.6 - please list them in this issue description.