SAPI input filter enhancements

Hi there, For flexible http query handling, I did some enhancement on the SAPI input filter (see README.input_filter for detail). This enables you to do a couple of things. - Rewrite variable names. - Replace the value by an arbitrary length of string. Currently you can only reduce the length. The patches can be found here: http://www.voltex.jp/patches/input_filter_patch.diff.gz A quick example is also available: http://www.voltex.jp/patches/input_filter_test.diff.gz Any comments will be appreciated. Moriyoshi