Extract the domain from a full url (e.g. "google.com" from
"https://www.google.com/calendar/render")
Usage
url_domain(urls, extended = F)
Arguments
urls
Single URL or a vector of URLs.
extended
If TRUE, returns the domain with a subomain
(if present). For instance, "www.domain.com/sub/blah/meh.html" would
return "domain.com/sub". Defaults to FALSE.