www: Add notes on SecurID PIN usage
www: Add notes on SecurID PIN usage

Signed-off-by: Kevin Cernekee <3105dbb3dd63fbb4f6371cfb04adc6726f76c56b@gmail.com>

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