Outdated nightlies on Travis-CI

[SimonSapin]

@brson, is Cloudfront (that we seem to be using for HTTPS) doing any caching? I’m somehow getting an outdated Cargo nigthly (2014-08-19 instead of 2014-08-20) on Travis-CI https://travis-ci.org/servo/rust-url/builds/33162181

The other suspect is Travis, if they’re doing caching themselves.

[sarahhodne]

Henrik from Travis CI here. We're not doing any kind of caching on this URL, my initial guess would be that something is going wrong somewhere in the CDN.

[brson]

My understanding is that cloudfront syncs every 24 hours. Unless I figure out how to make it sync with s3 more quickly I intend to just drop cloudfront. I'd love somebody to tell me which knob to frob.

[brson]

Cloudfront gives you 1000 object invalidations a month for free, so I'll look into having the bots do that automatically.