While manually upgrading a bunch of old WordPress sites, I realized that the WordPress htaccess rules for permalinks had changed. For many years and versions, the htaccess code that enables WordPress permalinks went unchanged, resulting in an almost sacred set of htaccess directives. Here are the original permalink rules as currently provided at the WordPress Codex:

The default URL for logging into your WordPress powered site is: http://example.com/wp-login.php. Or if you’ve installed in a subdirectory, something like http://example.com/wp/wp-login.php. I’ve wished that was a little cleaner, especially when you are doing something explaining to a client where to log in over the phone. Fortunately changing this can be very easy.