net/wireguard: Implement reload command in rc.d script to reload all peer

and key settings without restarting the daemon to avoid interface up/down
and loosing traffic. This does not work if you change the Address= line in
the [Interface] section which needs a real restart.

PR:		244862
Submitted by:	david@isnic.is

net/wireguard/Makefile

@@ -2,7 +2,7 @@
 
 PORTNAME=	wireguard
 PORTVERSION=	1.0.20200319
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net net-vpn
 MASTER_SITES=	https://git.zx2c4.com/wireguard-tools/snapshot/
 DISTNAME=	wireguard-tools-${PORTVERSION}

net/wireguard/files/wireguard.in

@@ -19,9 +19,11 @@
 
 name=wireguard
 rcvar=wireguard_enable
+extra_commands="reload"
 
 start_cmd="${name}_start"
 stop_cmd="${name}_stop"
+reload_cmd="${name}_reload"
 
 wireguard_start()
 {
@@ -39,6 +41,18 @@ wireguard_stop()
 	done
 }
 
+wireguard_reload()
+{
+	${wireguard_env:+eval export $wireguard_env}
+
+	for interface in ${wireguard_interfaces}; do
+		tmpfile="`mktemp`"
+		%%PREFIX%%/bin/wg-quick strip ${interface} > ${tmpfile}
+		%%PREFIX%%/bin/wg syncconf ${interface} ${tmpfile}
+		rm -f ${tmpfile}
+	done
+}
+
 load_rc_config $name
 
 : ${wireguard_enable="NO"}