Need to define a default ktdir
Clean up t/sqlite.db with make clean
Add error messages when there are no keys and/or enctypes
non forwardable host principal policy
Need to create krb5.conf early.

Otherwise, tests fail the first time in a clean build
Make KRB5DIR environment optional and default to Heimdal, add missing sed patterns
More KRB5DIR, ... cleanup
curve_25519 final for existing principals with kvno == 1