Repository metadata mirror list outdated

[Matthew Blissett]

Hi,

The mirror list ("A list of known mirrors is available in the Repository 
Metadata") given on 
https://maven.apache.org/guides/mini/guide-mirror-settings.html, and 
thus the repository metadata itself: 
https://repo.maven.apache.org/maven2/.meta/repository-metadata.xml is 
out of date: repo.exist.com and uk.maven.org no longer exist in DNS, and 
the two Ibiblio mirrors return a 404.

Other mirrors, like Google's: 
https://cloudplatform.googleblog.com/2015/11/faster-builds-for-Java-developers-with-Maven-Central-mirror.html 
<https://cloudplatform.googleblog.com/2015/11/faster-builds-for-Java-developers-with-Maven-Central-mirror.html> 
aren't listed.

Please pass this on to whoever might update the two items, since 
https://issues.sonatype.org/browse/MVNCENTRAL-6738 didn't lead anywhere.

Thanks,

Matt