Autoconf for Docweb

After speaking to Curt on IRC, yesterday, and finding out that he had platform-config problems with docweb, I came up with the following: http://www.phpdoc.info/docweb_autoconf.patch I've never authored autoconf scripts before, so if I'm way out in left field, here, be sure to let me know. Otherwise, I think this is useful. I'll also generate the /configure/ script and commit that, but you should be able to generate your own with autoconf and configure.in in the mean time. Let me know what you think S