It would be nice to be able to specify the url of a CRL for use with 
OpenVPN. Ideally, it would be fetched periodically and cached locally. 
It /should/ come from an https url using OpenVPN's CA cert, but that 
would be too much for most users. It may be nice as a hidden option, 
though. Alternately, m0n0wall could maintain it's own config.xml based 
CRL, but that would have the possibility of growing large, and thus 
requiring a larger image.