stoken: Fix CSD/stoken interaction
stoken: Fix CSD/stoken interaction

When using CSD, the auth form could be parsed more than once per
connection.  Change the accounting so that stoken_tries only gets
incremented if a tokencode is actually generated.

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

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