Clean up OpenSSL key loading
Clean up OpenSSL key loading

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

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