an autolink http://example.com
inside of parentheses (http://example.com)
http://www.google.com/search?q=Markup+(business)
http://www.google.com/search?q=Markup+(business)))
(http://www.google.com/search?q=Markup+(business))
(http://www.google.com/search?q=Markup+(business)
trailing slash http://example.com/ and http://example.com/path/
trailing paren https://www.owasp.org/index.php/Cross-site_Scripting_(XSS)
complex link http://elk.canda.biz/app/kibana#/discover?_g=()&_a=(columns:!(_source),index:'deve-*',interval:auto,query:(query_string:(analyze_wildcard:!t,query:'*')),sort:!('@timestamp',desc))