RFC: a better strip_tags() implementation with re2c

Hi, I've finally made a better strip_tags() implementation with re2c scanner generator. The new implementation comes with a set of generic methods that covers the current functionality plus several enhancements which enables us to properly handle tags that span multiple lines. The patch can be found at http://www.voltex.jp/patches/strip_tags-patch.diff.gz Any comments are welcome. Moriyoshi