STF regexp mungs up urls.

Just want to point out that the current stf.tags file will mung up drupal clean urls with underscores in them replacing all underscores with <i> </i> tags.

For example

http://www.example.com/blah_blah_blah

Would be parsed into

http://www.example.com/blah<i>blah</i>blah

This most probably needs just a [/s] after each stf regexp array entry.