Point the Ogre download at a specific mirror.
Point the Ogre download at a specific mirror.

Bypasses sourceforge's new JS-based redirect dingus that breaks Homebrew.

cf. https://github.com/Homebrew/homebrew/issues/41778#issuecomment-122380024
j-rivero/homebrew-simulation,scpeters/homebrew-simulation,osrf/homebrew-simulation