General: First pass at replacing Codex URLs with a corresponding HelpHub or DevHub article.

Props ianbelanger, tobifjellner, SergeyBiryukov.
See #47771.
Built from https://develop.svn.wordpress.org/trunk@45674


git-svn-id: http://core.svn.wordpress.org/trunk@45485 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -4693,7 +4693,7 @@ function sanitize_option( $option, $value ) {
 				$error = sprintf(
 					/* translators: %s: Codex URL */
 					__( 'A structure tag is required when using custom permalinks. <a href="%s">Learn more</a>' ),
-					__( 'https://codex.wordpress.org/Using_Permalinks#Choosing_your_permalink_structure' )
+					__( 'https://wordpress.org/support/article/using-permalinks/#choosing-your-permalink-structure' )
 				);
 			}
 			break;