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

todo was initially there for an optimization: don't loop to MAX_USERS when you know the upper limit is todo.

SIGHUP is sent when the tty is detached and by default kills the process. When we run in the background we don't care anymore about the tty, so it should be safe for us to ignore SIGHUP. (frankly, I expected daemon(3) to do stuff like this for us).

With new IRI, parser the old assumption of path starting with ./ is no longer valid.

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.