except that HUP does not reload lighttpd 1.4.x config
Those who only use systemd lighttpd service 'reload' to rotate
access log files might choose to add a command to send lighttpd a
HUP signal. See github pull request (below) for further discussion.
[patch edited by gstrauss]
x-ref:
https://github.com/lighttpd/lighttpd1.4/pull/72