diff -durN syslog-ng329.orig/files/patch-modules_afsocket_socket-options.c syslog-ng329/files/patch-modules_afsocket_socket-options.c
--- syslog-ng329.orig/files/patch-modules_afsocket_socket-options.c	1970-01-01 03:00:00.000000000 +0300
+++ syslog-ng329/files/patch-modules_afsocket_socket-options.c	2020-09-24 20:35:40.059173000 +0300
@@ -0,0 +1,20 @@
+--- modules/afsocket/socket-options.c.orig	2020-08-10 18:04:39 UTC
++++ modules/afsocket/socket-options.c
+@@ -86,7 +86,16 @@ _setup_keepalive(gint fd)
+ static gboolean
+ _setup_reuseport(gint fd)
+ {
+-#ifdef SO_REUSEPORT
++#if defined(SO_REUSEPORT_LB)
++  gint on = 1;
++  if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT_LB, &on, sizeof(on)) < 0)
++    {
++      msg_error("The kernel refused our SO_REUSEPORT_LB setting",
++                evt_tag_error("error"));
++      return FALSE;
++    }
++  return TRUE;
++#elif defined(SO_REUSEPORT)
+   gint on = 1;
+   if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &on, sizeof(on)) < 0)
+     {
diff -durN syslog-ng329.orig/files/pkg-message.in syslog-ng329/files/pkg-message.in
--- syslog-ng329.orig/files/pkg-message.in	2020-09-11 12:47:08.863630000 +0300
+++ syslog-ng329/files/pkg-message.in	2020-09-29 13:54:07.772913000 +0300
@@ -30,4 +30,12 @@
      %%PREFIX%%/etc/rc.d/syslog-ng start
 EOM
 }
+{ type: upgrade
+  maximum_version: "3.29.1"
+  message: <<EOM
+Upgrading from before 3.29.1 should to replace these variables (if used):
+* syslog_ng_flags instead syslog_ng_config (but legacy syslog_ng_config still works);
+* syslog_ng_pidfile instead syslog_ng_pid (but syslog_ng_pid still works).  
+EOM
+}
 ]
diff -durN syslog-ng329.orig/files/syslog-ng.in syslog-ng329/files/syslog-ng.in
--- syslog-ng329.orig/files/syslog-ng.in	2020-09-11 12:47:08.864150000 +0300
+++ syslog-ng329/files/syslog-ng.in	2020-09-28 19:07:59.649320000 +0300
@@ -12,35 +12,47 @@
 # to enable this service:
 #
 #syslog_ng_enable="YES"
-#syslog_ng_config="-u daemon"
-#syslog_ng_pid="/var/run/syslog-ng.pid"
+#syslog_ng_flags="-u daemon"
+#syslog_ng_pidfile="/var/run/syslog-ng.pid"
 #
 
-syslog_ng_purgeklog=${syslog_ng_purgeklog-"NO"}
-
 . /etc/rc.subr
 
 name=syslog_ng
 rcvar=syslog_ng_enable
 
-command=%%PREFIX%%/sbin/syslog-ng
-required_files=%%PREFIX%%/etc/syslog-ng.conf
-extra_commands=reload
+load_rc_config $name
 
+: ${syslog_ng_enable:="NO"}
+: ${syslog_ng_purgeklog:="NO"}
+: ${syslog_ng_config:="%%PREFIX%%/etc/syslog-ng.conf"}
+: ${syslog_ng_pidfile:=/var/run/syslog.pid}
+
+# backwards compatibility
+if [ -n "${syslog_ng_pid}" ]; then
+	syslog_ng_pidfile="${syslog_ng_pid}"
+fi
+if [ ! -f "${syslog_ng_config}" ]; then
+	syslog_ng_flags="${syslog_ng_config}"
+	syslog_ng_config="%%PREFIX%%/etc/syslog-ng.conf"
+fi
+
 if checkyesno syslog_ng_purgeklog; then
-	start_precmd="echo \"Purging klog(9)\" && sysctl -w kern.msgbuf_clear=1 $start_precmd";
+	start_precmd="echo \"Purging klog(9)\" && sysctl -w kern.msgbuf_clear=1"
 fi
 
-stop_postcmd=stop_postcmd
+pidfile="${syslog_ng_pidfile}"
+required_files="${syslog_ng_config}"
 
-load_rc_config $name
+command="%%PREFIX%%/sbin/syslog-ng"
+command_args="-f ${syslog_ng_config} -p ${pidfile}"
 
-: ${syslog_ng_enable:="NO"}
-pidfile=${syslog_ng_pid:-"/var/run/syslog.pid"}
-command_args="-p ${pidfile} ${syslog_ng_config}"
+stop_postcmd="stop_postcmd"
+extra_commands="reload"
 
-stop_postcmd() {
-  rm -f $pidfile
+stop_postcmd()
+{
+	rm -f "${pidfile}"
 }
 
 run_rc_command "$1"