Add --with-db-type-preference config param

tests/kdc/Makefile.am

@@ -58,6 +58,7 @@ do_subst = $(heim_verbose)sed $(do_dlopen) \
 	-e 's,[@]pwport[@],$(pwport),g' \
 	-e 's,[@]objdir[@],$(top_builddir)/tests/kdc,g' \
 	-e 's,[@]top_builddir[@],$(top_builddir),g' \
+	-e 's,[@]db_type[@],$(db_type),g' \
 	-e 's,[@]EGREP[@],$(EGREP),g' 
 
 chmod = chmod

tests/kdc/check-iprop.in

@@ -35,8 +35,7 @@ top_builddir="@top_builddir@"
 env_setup="@env_setup@"
 objdir="@objdir@"
 
-default_db_type=@default_db_type@
-db_type=${1:-${default_db_type}}
+db_type=@db_type@
 
 . ${env_setup}
 
@@ -175,6 +174,11 @@ sleep 2
 KRB5_CONFIG="${objdir}/krb5-slave.conf" \
 ${kadmin} -l get host/bar@${R} > /dev/null 2>/dev/null && exit 1
 
+# See note below in LMDB sanity checking
+echo "Re-add host"
+${kadmin} -l add --random-key --use-defaults host/foo@${R} || exit 1
+${kadmin} -l add --random-key --use-defaults host/bar@${R} || exit 1
+
 echo "kill slave and remove log and database"
 > iprop-stats
 sh ${leaks_kill} ipropd-slave $ipds || exit 1
@@ -337,4 +341,14 @@ ${iprop_log} last-version > slave-last.tmp
 ${iprop_log} last-version > master-last.tmp
 cmp master-last.tmp slave-last.tmp || exit 1
 
+if [ "$db_type" = lmdb ]; then
+    # Sanity check that we have the same number of principals at the HDB
+    # and LMDB levels.
+    #
+    echo "checking that principals in DB == entries in LMDB"
+    princs=`${kadmin} -l list '*' | wc -l`
+    entries=`mdb_stat -n current-db.mdb | grep 'Entries:' | awk '{print $2}'`
+    [ "`expr 1 + "$princs"`" -eq "$entries" ] || exit 1
+fi
+
 exit $ec

tests/kdc/krb5.conf.in

@@ -72,14 +72,14 @@
 
 	database = {
 		label = { 
-			dbname = @objdir@/current-db@kdc@
+			dbname = @db_type@:@objdir@/current-db@kdc@
 			realm = TEST.H5L.SE
 			mkey_file = @objdir@/mkey.file
 			acl_file = @srcdir@/heimdal.acl
 			log_file = @objdir@/current@kdc@.log
 		}
 		label2 = { 
-			dbname = @objdir@/current-db@kdc@
+			dbname = @db_type@:@objdir@/current-db@kdc@
 			realm = TEST2.H5L.SE
 			mkey_file = @objdir@/mkey.file
 			acl_file = @srcdir@/heimdal.acl