Hugo finds URLs in plain text and makes links

[briandfoy]

See the example.com links in

• [ ] https://www.perl.com/pub/2010/08/rethinking-perl-web.html/
• [ ] https://www.perl.com/pub/2002/03/22/modperl.html/
• [ ] https://www.perl.com/pub/2010/04/a-website-in-a-minute-using-dancer-the-effortless-web-framework.html/
• [ ] https://www.perl.com/pub/2011/09/automating-telephony-with-perl-and-twilio.html/

See https://stackoverflow.com/questions/37564946/write-a-link-that-does-not-get-converted-to-an-a-tag-in-a-markdownified-strin