This is the proper way to handle bootup output for the
console: request it and don't output ever time it's called
during boot....

Not perfect yet, some spots still taint the backend with
requiring relayd.inc which should only be included by the
plugin's own files directly.

When working on another plugin, I remembered why this was usefull ;)

This reverts commit e55feb1e.

(filter) move ipv6 interface rules, loopback, fw output rules, and fix antispool order (wasn't on top)

rc: fix an infinite loop on tty close

if the tty is closed while the script is running,
it would previously go in an infinite loop trying
to read from and write to the now-defunct tty.

fixes: https://github.com/opnsense/core/issues/1240