From Gerri:

configure:
  - disable Kerberos if Heimdal implementation is detected
  - fix a problem handling a failure in the detection of openssl/x509.h
  - by default, disable globus to avoid spurious build attempts.


git-svn-id: http://root.cern.ch/svn/root/trunk@18642 27541ba8-7e3a-0410-8455-c3a389f83636