Trim config output

With extensive help and feedback from Richard and Andy.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Andy Polyakov <appro@openssl.org>

config

@@ -903,8 +903,6 @@ OUT="$OUT"
 
 $PERL $THERE/Configure LIST | grep "$OUT" > /dev/null
 if [ $? = "0" ]; then
-  echo Configuring for $OUT
-
   if [ "$VERBOSE" = "true" ]; then
     echo $PERL $THERE/Configure $OUT $options
   fi  
@@ -913,5 +911,6 @@ if [ $? = "0" ]; then
   fi
 else
   echo "This system ($OUT) is not supported. See file INSTALL for details."
+  exit 1
 fi
 )