* luci/i18n: rename *.pt_br.* to *.pt-br.*, extend luci.i18n to convert "_" to "-" in language tags
* luci/i18n: various translation fixes, thanks Carlos!
* luci/i18n, luci/app/statistics: add updated lua files too
* luci/i18n/portuguese_brazilian: - fixes for core translation - added translations for ushare, uvc_streamer, p910nd, upnp and samba
* luci/i18n/portuguese_brazilian: add fixes and translations for ddns, qos, firewall and ntp client
* luci/i18n/portuguese-brazilian: complete core translation
* luci/i18n/portuguese_brazilian: add translated lua files