Todo list v1.0:
* if-modified header handling for statichandler
* more configurable request logging.
* Better doco
* Better/more thorough tests
* multipart request handling
* ParameterParseHandler: multivalued params
* figure out where socketfactory::ssl is, and how it works
* put $VERSION in all mods
* CGI handler
* figure out how to unblock on long requests?