coreos/coreos-overlay — pull request #544 by marineam (2014-04-13 20:17:43+00:00)
Title: fix(coreos-base/oem-gce): Replace curl's --retry with block_until_url

Curl will not retry after most errors, just connection timeouts and some
HTTP errors. In our case the most likely error is network unreachable.
Instead use our simple-minded but trusty block_until_url script to wait.