Log Message:
Version 2.12 (released 2012-06-15)

 * Only use libyubikey when --with-cr is used.

 * Set correct permissions on tempfile.

 * YubiKey 2.2 contains a bug in challenge-response that makes it output the
   same response to all challenges unless HMAC_LT64 is set. Add warnings to
   ykpamcfg and a warning through conversate in the pam module. Keys programmed
   like this should be reprogrammed with the HMAC_LT64 flag set.