shadowsocks-libev: add ipv6_first option support

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

net/shadowsocks-libev/Makefile

@@ -14,7 +14,7 @@ include $(TOPDIR)/rules.mk
 #
 PKG_NAME:=shadowsocks-libev
 PKG_VERSION:=3.0.8
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/shadowsocks/shadowsocks-libev/releases/download/v$(PKG_VERSION)

net/shadowsocks-libev/files/shadowsocks-libev.init

@@ -58,10 +58,12 @@ ss_mkjson_server_conf_() {
 }
 
 ss_mkjson_common_conf() {
+	[ "$ipv6_first" = 0 ] && ipv6_first=false || ipv6_first=true
 	[ "$fast_open" = 0 ] && fast_open=false || fast_open=true
 	[ "$reuse_port" = 0 ] && reuse_port=false || reuse_port=true
 	cat <<-EOF
 		"use_syslog": true,
+		"ipv6_first": $ipv6_first,
 		"fast_open": $fast_open,
 		"reuse_port": $reuse_port,
 		${local_address:+${q}local_address${q}: ${q}$local_address${q},}
@@ -264,9 +266,10 @@ validate_common_options_() {
 
 	"${func:-ss_validate}" "$cfgtype" "$cfg" "$@" \
 		'disabled:bool:0' \
-		'verbose:bool:0' \
 		'fast_open:bool:0' \
+		'ipv6_first:bool:0' \
 		'reuse_port:bool:0' \
+		'verbose:bool:0' \
 		'mode:or("tcp_only", "udp_only", "tcp_and_udp")' \
 		'mtu:uinteger' \
 		'timeout:uinteger' \