Fix netmask option handling
Fix netmask option handling

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

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