Merge branch 'master' into registrar_list

.gitignore

.gitlab-ci.yml

README.md

client/html/262c4bd9d237634de218.worker.js

client/html/b34fb6e018929c37f72b.worker.js

client/html/prism.js

client/html/user-guide/.buildinfo

client/html/user-guide/downloading.html

client/html/user-guide/genindex.html

client/html/user-guide/index.html

client/html/user-guide/intro.html

client/html/user-guide/objects.inv

client/html/user-guide/sample-requests.html

client/html/user-guide/search.html

client/html/user-guide/searchindex.js

client/html/user-guide/searching.html

client/html/user-guide/viewing.html

client/html/user-guide/web-client.html

documentation/.gitignore

documentation/operator-guide/Makefile