URLs and Mails break with smart tagging

Hi,

Currently, smart tagging interferes with URLs and Mail addresses. For example, create a page with the content:

E-mail me at: brainy@example.com

If I have a delicious tag called example, the deliciousIcon.gif file will be placed:

E-mail me at: brainy@example[HERE].com

This breaks other modules. The URL converter filter (core) for example ends up printing the link of this e-mail as:

mailto:brainy@example

To summarize: All in all, I believe Smart Tagging must not add tags to e-mail addresses and URLs.

A patch is attached which fixes this.