2.5.x changed some auth failure error messages and user document field order
2.5.x change can't find cursor error message
2.5.x forces all queries on $cmd to be limit(1/-1)
2.5.x non-release builds have negative build numbers
Setting a server in maintenence mode which is in it already does bad
things on the server. this workaround seems to do more harm then good
This test fails with a weird segfault somewhere in the engine on PHP 5.2

Since its on PHP 5.2 which noone cares about anyway we stick our head in
the ground and pretend it doesn't exist
Merged Pull Request #501

* pull-request/501:
  This test fails with a weird segfault somewhere in the engine on PHP 5.2
  Setting a server in maintenence mode which is in it already does bad things on the server. this workaround seems to do more harm then good
  2.5.x non-release builds have negative build numbers
  2.5.x forces all queries on $cmd to be limit(1/-1)
  2.5.x change can't find cursor error message
  2.5.x changed some auth failure error messages and user document field order
PHP-844: Authenticate before calling isMaster()

This is effectively (although not literally) a revert of
c5254c76297e8c48ceef3a2f1f36f3f9c274e744

Turns out, arbiters have a issue with this so this feature has been put
on hold by mongod