Run service as separate user

contrib/systemd/alfis.service

@@ -6,11 +6,12 @@ After=network.target
 After=alfis-default-config.service
 
 [Service]
+User=alfis
 Group=alfis
 ProtectHome=true
 ProtectSystem=true
 SyslogIdentifier=alfis
-CapabilityBoundingSet=CAP_NET_ADMIN
+CapabilityBoundingSet=CAP_NET_ADMIN CAP_NET_BIND_SERVICE
 WorkingDirectory=/var/lib/alfis
 ExecStart=/usr/bin/alfis -n -c /etc/alfis.conf
 ExecReload=/bin/kill -HUP $MAINPID
@@ -18,4 +19,4 @@ Restart=always
 TimeoutStopSec=5
 
 [Install]
-WantedBy=multi-user.target
+WantedBy=multi-user.target