daemon: re-enable SIGWINCH without setsid

This allows systemd users to use SIGWINCH to temporarily
(and gracefully) stop an instance of a service without
doing a code reload to bring it back up:

	# start temporary new service code
	systemctl start public-inbox-nntpd@2.service

	# momentarily paralyze original service
	systemctl kill -s WINCH public-inbox-nntpd@1.service

	if new_code_at_2_sucks
	then
		# restart original workers
		systemctl kill -s HUP public-inbox-nntpd@1.service
	else # new is better than old, replace original instance
		systemctl restart public-inbox-nntpd@1.service
	fi

	# cleanup the temporary service
	systemctl stop public-inbox-nntpd@2.service

This partially reverts commit 73d274e83b7d300f31e0cc1ceeacbf73c6c2a1e4
("daemon: disable SIGWINCH unless explicitly daemonized")

0 files changed, 0 insertions, 0 deletions