gluon-ath9k-workaround: bug reporting support

If the `monitor` attribute in the site.conf is defined, the cron
script is modifed to send debug informations, generated on bug
detection, to given remote host and port,
e.g.: "fda1:384a:74de:4242::2 8090"

package/gluon-ath9k-workaround/files/lib/gluon/upgrade/ath9k-workaround/invariant/010-monitor

+#!/usr/bin/lua
+
+local site = require 'gluon.site_config'
+local uci = require 'luci.model.uci'
+
+local c = uci.cursor()
+
+local f = io.open('/lib/gluon/cron/ath9k-workaround','w')
+if f and site.monitor ~= nil then
+  f:write('* * * * * /usr/sbin/ath9k-workaround | nc ' .. site.monitor)
+  f:close()
+end