opensim/bin/Physics/OpenSim.Region.Physics.BulletSPlugin.dll.config

<configuration>
  <dllmap os="windows" cpu="x86" dll="BulletSim" target="lib32/BulletSim" />
  <dllmap os="windows" cpu="x86-64,ia64" dll="BulletSim" target="lib64/BulletSim" />
  <dllmap os="!windows,osx" cpu="x86" dll="BulletSim" target="lib32/libBulletSim.so" />
  <dllmap os="!windows,osx" cpu="x86-64,ia64" dll="BulletSim" target="lib64/libBulletSim.so" />
</configuration>