travelmate: update to release 2.0

- new package dependency: curl (plus one of the wpad variants)
- optional package dependencies:
  - 'msmtp' for email notification support
  - 'wireguard' or 'openvpn' for vpn support
- removed WEP support, only WPA/WPA2/WPA3 are supported!
- new, more robust setup wizard (CLI and LuCI)
- more robust captive portal detection
- randomize mac addresses with every uplnk connect
- automatic vpn handling during uplink switch (only classic/simple
  client-setups for wireguard or openvpn are supported)
- email notifications after successful uplink connections
- automatically disable uplinks after n minutes, e.g. for timed
  connections
- automatically (re-)enable uplinks after n minutes, e.g. after failed
  login attempts
- complete LuCI rewrite - migrated to client side JS (separate PR)

Signed-off-by: Dirk Brenken <dev@brenken.org>

net/travelmate/files/travelmate_ntp.hotplug

@@ -0,0 +1,31 @@
+#!/bin/sh
+# ntp hotplug script for travelmate
+# Copyright (c) 2020 Dirk Brenken (dev@brenken.org)
+# This is free software, licensed under the GNU General Public License v3.
+
+# set (s)hellcheck exceptions
+# shellcheck disable=1091,2016,2039,2059,2086,2143,2181,2188
+
+trm_init="/etc/init.d/travelmate"
+trm_ntpfile="/var/state/travelmate.ntp"
+trm_logger="$(command -v logger)"
+
+f_log()
+{
+	local class="${1}" log_msg="${2}"
+
+	if [ -x "${trm_logger}" ]
+	then
+		"${trm_logger}" -p "${class}" -t "trm-ntp  [${$}]" "${log_msg}"
+	else
+		printf "%s %s %s\\n" "${class}" "trm-ntp  [${$}]" "${log_msg}"
+	fi
+}
+
+if [ "${ACTION}" = "stratum" ] && [ ! -f "${trm_ntpfile}" ] && \
+	[ "$("${trm_init}" enabled; printf "%u" ${?})" -eq "0" ]
+then
+	> "${trm_ntpfile}"
+	f_log "info" "get ntp time sync"
+	"${trm_init}" restart
+fi