Ignore some special characters from the very end of URL

Ignore period, comma and question mark from the very ending of the URL. Allows people to write:

"Check out my website at www.arturgajewski.com/piano. It is a piano learning ebook I wrote."

or

"Want me to visit www.github.com? Really?"

or

"My photography site is at www.arturgajewski.com, but it only contains child portraits."