Bug#620428: (no subject)

[Ken Sharp <kennybobs@o2.co.uk>]

It looks like this change has made it downstream to Ubuntu for 5.9x but 
the problem remains.

  if [ x$SSH_AUTH_SOCK != x ] && ssh-add -L >/dev/null 2>&1; then
    GET_ID="$GET_ID ssh-add -L"
  fi

if [ -z "`eval $GET_ID`" ] && [ -r "${ID_FILE}" ] ; then
  GET_ID="cat \"${ID_FILE}\""
fi

https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1074798