https-dns-proxy: new init script and config files

Signed-off-by: Stan Grishin <stangri@melmac.net>

net/https-dns-proxy/files/https_dns_proxy.init

@@ -1,39 +1,37 @@
 #!/bin/sh /etc/rc.common
 
 START=80
-
 USE_PROCD=1
+
 PROG=/usr/sbin/https_dns_proxy
 
+xappend() { param="$param $1"; }
+
+append_parm() {
+	local section="$1"
+	local option="$2"
+	local switch="$3"
+	local default="$4"
+	local _loctmp
+	config_get _loctmp "$section" "$option" "$default"
+	[ -z "$_loctmp" ] && return 0
+	xappend "$switch $_loctmp"
+}
+
 start_instance() {
-	local cfg="$1"
-	local listen_addr listen_port user group
+	local cfg="$1" param
 
-	config_get listen_addr "$cfg" listen_addr
-	config_get listen_port "$cfg" listen_port
-	config_get user "$cfg" user
-	config_get group "$cfg" group
-	config_get subnet_addr "$cfg" subnet_addr
-	config_get proxy_server "$cfg" proxy_server
-	config_get url_prefix "$cfg" url_prefix
-
-	if [ -n "$subnet_addr" ]; then
-		subnet_param="-e $subnet_addr"
-	fi
-
-	if [ -n "$proxy_server" ]; then
-		proxy_param="-t $proxy_server"
-	fi
-
-	if [ -z "$url_prefix" ]; then
-		url_prefix="https://dns.google.com/resolve?"
-	fi
+	append_parm "$cfg" 'listen_addr' '-a' '127.0.0.1'
+	append_parm "$cfg" 'listen_port' '-p' '5053'
+	append_parm "$cfg" 'bootstrap_dns' '-b'
+	append_parm "$cfg" 'url_prefix' '-r'
+	append_parm "$cfg" 'user' '-u' 'nobody'
+	append_parm "$cfg" 'group' '-g' 'nogroup'
+	append_parm "$cfg" 'subnet_addr' '-e'
+	append_parm "$cfg" 'proxy_server' '-t'
 
 	procd_open_instance
-	procd_set_param command ${PROG} \
-		-a "$listen_addr" -p "$listen_port" \
-		-u "$user" -g "$group" $subnet_param $proxy_param \
-		-r "$url_prefix"
+	procd_set_param command ${PROG} ${param}
 	procd_set_param respawn
 	procd_close_instance
 }