MAUCacheAdmin has been updated to version 3.0

MAUCacheAdmin was updated to version 3.0 this afternoon to account for a change in the CDN infrastructure that serves Microsoft Office for Mac updates. As was reported in the #microsoft-autoupdate channel of the MacAdmins Slack yesterday, version 2.9 was marking every package as corrupt and re-downloading them all on each run.

From Paul Bowden’s commit notes:

In the October 2021 update, Microsoft moved to a new CDN namespace (officecdnmac.microsoft.com) which supports HTTP/2

However, the previous version of MAUCacheAdmin relied on the HTTP/1.1 ‘Content-Length’ header – which is all lowercase in HTTP/2

So:
1. Changed awk search to grep -i as it’s still possible for the new CDN to emit a HTTP/1.1 response in some cases
2. Changed main URL definitions to new namespace of officecdnmac.microsoft.com

Also fixed up a few other problems:
* Removed MAU 3.x definition
* Added 365/2021 to existing 2019 title (visual change only)
* Updated copyright year

MacAdmins who run a MAU Manifest and/or Caching server should update to the latest version of the code to prevent these looping downloads.

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