Simplify wwctl server

- Always run in the foreground
- Always log to stdout/err (unless syslog is requested)
- Update systemd to reload with a direct signal
- Omit any pidfile for "warewulfd"

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

include/systemd/warewulfd.service.in

@@ -5,15 +5,11 @@ After=network-online.target
 AssertFileIsExecutable=@BINDIR@/wwctl
 
 [Service]
-Type=simple
+Type=exec
 User=root
 Group=root
-
-ExecStart=@BINDIR@/wwctl server start
-ExecReload=@BINDIR@/wwctl server reload
-ExecStop=@BINDIR@/wwctl server stop
-
-PIDFile=/var/run/warewulfd.pid
+ExecStart=@BINDIR@/wwctl server
+ExecReload=/bin/kill -HUP "$MAINPID"
 Restart=always
 
 [Install]