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

Props ianbelanger, tobifjellner, SergeyBiryukov.
See #47771.

git-svn-id: https://develop.svn.wordpress.org/trunk@45674 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/deprecated.php

@@ -53,7 +53,7 @@ function get_postdata($postid) {
  *
  * Use The Loop instead.
  *
- * @link https://codex.wordpress.org/The_Loop
+ * @link https://developer.wordpress.org/themes/basics/the-loop/
  *
  * @since 1.0.1
  * @deprecated 1.5.0
@@ -1279,7 +1279,7 @@ function get_category_children( $id, $before = '/', $after = '', $visited = arra
  * @deprecated 4.0.0 Use get_terms()
  * @see get_terms()
  *
- * @link https://codex.wordpress.org/Function_Reference/get_all_category_ids
+ * @link https://developer.wordpress.org/reference/functions/get_all_category_ids/
  *
  * @return object List of all of the category IDs.
  */