'httpd4Mac' is an fba (Faceless Background Application) that
implements a minimal http server.
It currently supports the GET and HEAD methods, with full or simple
requests. It ignores 'Accept' fields from the client. NB The http spec
does not allow such a thing as a simple HEAD request. The only simple
method is GET. But seeing as the CERN server accepts it (and the guy
who invented WWW wrote that program) I thought I should also.
