For editing the wp-confi.php depending on things I did, I got different errors depending how I did it.
If I add the lines immediately the “happy blogging” comment, I get timed out errors from my blog and admin log in page.
If I add the lines before the define(WP_SITEURL’, $pageURL) part, my blog is visible only as html. But I can’t log back in because of ‘timed out error’.
If I add the lines at the very end then no error message, and instead of one being greyed out, both are. While it will change the “Site Address URL” it will not change the “WordPress Address URL”
For editing the functions.php, I don’t get errors. The process will change the “Site Address URL” without greying it out, but it won’t change the “WordPress Address URL”. (I check in admin before deleting the lines I added).