httpd.service: Support reload

This is useful when ACME has generated a new TLS certificate.

+1
+1
nixos/modules/services/web-servers/apache-httpd/default.nix
··· 685 685 686 686 serviceConfig.ExecStart = "@${httpd}/bin/httpd httpd -f ${httpdConf}"; 687 687 serviceConfig.ExecStop = "${httpd}/bin/httpd -f ${httpdConf} -k graceful-stop"; 688 + serviceConfig.ExecReload = "${httpd}/bin/httpd -f ${httpdConf} -k graceful"; 688 689 serviceConfig.Type = "forking"; 689 690 serviceConfig.PIDFile = "${mainCfg.stateDir}/httpd.pid"; 690 691 serviceConfig.Restart = "always";