luci-app-openvpn: re-add options comp_lzo and comp_noadapt

* re-add config option comp_lzo according to
  openwrt/openwrt@3850b41


* re-add config option comp_noadapt. This has never been removed
  from openwrt

Signed-off-by: Martin Schiller <ms@dev.tdt.de>