this way, we can sandbox the listener with seccomp (todo) or capsicum (already done) and still have CGI scripts. When we want to exec, we tell the executor what to do, the executor executes the scripts and send the fd backt to the listener.

It's correct, while my hacked valid_multibyte_utf8 would allow things that aren't technically UTF8.

This extends the URI parser so it supports full IRI (Internationalized Resource Identifiers, RFC3987). Some areas of it can/may be improved, but here's a start. Note: we assume UTF-8 encoded IRI.