Intermittent failure caused by failing to fetch calico manifest

[consideRatio]

The exit code 22 is probably from curl:

22="HTTP page not retrieved. The requested url was not found or returned another error with the HTTP error code being 400 or above. This return code only appears if -f, --fail is used."

[manics]

Curl has a --retry flag, but that won't help if it's a GitHub outage lasting several minutes.