Make LDAP code fetch less attributes from LDAP server when KDC is asking

Johan Gadsjö did a awesome analysis of the LDAP access pattens
and sent us a patch that reduced the calls the ldap server by 4
times as many. The patch was adopted and change to avoid compile
time depencies and make the determination runtime instead. Thanks!

lib/kadm5/ipropd_master.c

@@ -361,7 +361,7 @@ send_complete (krb5_context context, slave *s,
 	return ret;
     }
 
-    ret = hdb_foreach (context, db, 0, prop_one, s);
+    ret = hdb_foreach (context, db, HDB_F_ADMIN_DATA, prop_one, s);
     if (ret) {
 	krb5_warn (context, ret, "hdb_foreach");
 	slave_dead(context, s);