Disabled AttackWander for ants and zombies

closes #3565
Merge pull request #3824 from Mailaender/the-standing-dead

Disabled AttackWander for ants and zombies
Update civilian.yaml

Remove bib from Oil Derrick as it caused graphical errors on some maps where it was placed near terrain obstacles. (The bib being on top of a river for example)
Merge pull request #3827 from epicelite/patch-2

Update civilian.yaml
Allow the driver to decide the best FBO depth format.
Merge pull request #3828 from pchote/fbo-fixup

Request a more general FBO depth format.