Private key support (for git) about bigtuna

[michalbugno]

This is a workaround when people can't see the ssh public key of user which runs bigtuna and therefore can't add it to github keys?

[wuputah]

Yes, Heroku being the prime example, but even on EngineYard the key configuration is somewhat strange - they do not put the private key in the standard place or add it using "ssh-add". This is where I first learned about the GIT_SSH trick.