Prevent trailing URL punctuation from being parsed into URLs

[dandv]

I see that this instance of MyBB has partially solved an issue that I reported at http://dev.mybb.com/issues/1623: punctuation at the end of URLs gets parsed into URLs.

As you can see above, colons are still parsed into the URL. But periods and commas aren't. Here's an URL with a trailing comma: http://forum.quantifiedself.com, and one with a trailing period: http://mybb.com.

Can someone please post the patch for this on the dev site?