kennethreitz/requests — pull request #947 by JohnPeacockMessageSystems (2012-11-21 18:40:29+00:00)
Title: Only return a path if the cacert.pem file exists.

This will permit the deletion of just that one file in order
to fall back to the [probably more accurate but less consistent]
Distro provided CA certs.

I need to be able to add our internal CA and I don't want to have to patch your module every time I upgrade. Personally, I think it is backwards to prefer your own CA certs with no good way to prefer
the OS/Distro provided certs. I realize it makes your testing much easier since you have a known
list of certs. Providing an environment override is a poor substitute to an actual API.