This was brought up in bug 30213.
The API has been around for a while now and many scripts even started to
assume it's presence by default.
What we'd like to know: Do you have one of these configuration variables
set to false on your wiki ? And if so, what is the reason for this. We'd
like to collect some information and motivation on this so that we can make
a better decision at removing these and/or helping in finding a solution
(if needed) to the problem that is currently being solved by setting these
variables to false.
Note that no decision has been made, no need to panic :-)