Disable --script-tun option on MinGW
Disable --script-tun option on MinGW

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

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