Pasted

^https?\:\/\/([a-z]+\.)?(domain)+\.(tld)[\/]?
 example:
 ^https?\:\/\/([a-z]+\.)?netflix+\.com[\/]?
translates to: *.netflix.com/*
matches:
http://www.netflix.com
https://www.netflix.com
http://netflix.com
http://netflix.com/
https://netflix.com/
http://asubdomain.netflix.com/