Don't truncate config.log when configuration is successful.
--- config/functions.orig	2019-10-07 10:55:57.000000000 -0500
+++ config/functions	2019-10-07 10:55:57.000000000 -0500
@@ -240,7 +240,6 @@
 #
 save () {
   # initilize the config files
-  echo -n "" > config.log 
   echo -n "" > config.make
   echo -n "" > config.h