CSD stub URL is optional
CSD stub URL is optional

The recent change in commit b6ef1c86b6d29684e5a24b62e19827afafec13ed ('Fix
CSD trojan download') was wrong; for the XML POST case we don't necessarily
get handed a trojan to download. We're expected to have a local 'wrapper'
script which will act like a locally-installed 'hostscan'.

The wait URL *is* required though.

Signed-off-by: David Woodhouse <b460d66aaf00c296a3db1c1d9eeafc081d5f7d70@intel.com>

cernekee/openconnect,lins05/openconnect,lins05/openconnect,mtmiller/openconnect,don-johnny/openconnect,chadcatlett/openconnect,atyndall/openconnect,atyndall/openconnect,mtmiller/openconnect,brandt/openconnect,nmav/openconnect-mine,cernekee/openconnect,don-johnny/openconnect,brandt/openconnect,matlockx/openconnect,lins05/openconnect,liiir1985/openconnect,don-johnny/openconnect,mveplus/openconnect-client,mtmiller/openconnect,neshema/openconnect,liiir1985/openconnect,mveplus/openconnect-client,mveplus/openconnect-client,liiir1985/openconnect,nmav/openconnect-mine,mveplus/openconnect-client,chadcatlett/openconnect,matlockx/openconnect,matlockx/openconnect,brandt/openconnect,don-johnny/openconnect,cernekee/openconnect,nmav/openconnect-mine,chadcatlett/openconnect,mtmiller/openconnect,neshema/openconnect,atyndall/openconnect,chadcatlett/openconnect,neshema/openconnect,liiir1985/openconnect,nmav/openconnect-mine,lins05/openconnect,neshema/openconnect,brandt/openconnect,matlockx/openconnect,atyndall/openconnect,cernekee/openconnect