Store data about old and new term IDs when shared terms are split.

Props mboynes.
See #30335.
Built from https://develop.svn.wordpress.org/trunk@30492


git-svn-id: http://core.svn.wordpress.org/trunk@30481 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -4115,6 +4115,11 @@ function _split_shared_term( $term_id, $term_taxonomy_id ) {
 		clean_term_cache( $term_id, $shared_term_taxonomy );
 	}
 
+	// Keep a record of term_ids that have been split, keyed by old term_id.
+	$split_term_data = get_option( '_split_terms_' . $term_taxonomy->taxonomy, array() );
+	$split_term_data[ $term_id ] = $new_term_id;
+	update_option( '_split_terms_' . $term_taxonomy->taxonomy, $split_term_data );
+
 	/**
 	 * Fires after a previously shared taxonomy term is split into two separate terms.
 	 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-beta2-30491';
+$wp_version = '4.1-beta2-30492';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.