for the "db4" option and just rely on the appropriate BDB_* settings
via bdb.buildlink3.mk. Also, we tweak the builtin.mk file so use
krb5-config, if it's available, to check the version of the built-in
heimdal. Patches patch-ab, patch-ae and patch-af have been sent back
upstream and will be incorporated into future Heimdal releases.
Changes between version 0.6.5 and version 0.7.1 include:
* Support for KCM, a process based credential cache
* Support CCAPI credential cache
* SPNEGO support
* AES (and the gssapi conterpart, CFX) support
* Adding new and improve old documentation
* Bug fixes
