Google+ no longer exists
The link to https://plus.google.com/100957455777699991449/about is no longer useful since G+ shut down.
It should be removed from https://gitlab.xiph.org/search?utf8=%E2%9C%93&snippets=false&scope=&repository_ref=master&search=100957455777699991449&group_id=2&project_id=7