Toolbar in destination site links to source website after site copy

Problem/Motivation

I was experimenting with config management on my local PC. I use Opensuse 13.2. Reproduce problem as follows

• Install standard D8 to http://testserver/d8t1 with database d8t1
• Copy site to second site http://testserver/d8t2 with database d8t2 as per https://www.drupal.org/node/2416545
• Copy database d8t1 to d8t2 with phpMyAdmin
• Copy files with a file manager from d8t1 directory to d8t2 directory
• Adjust one line in settings.php of d8t2 to point to d8t2 databse
• Within d8t2 site, toolbar items on both lines point to d8t1 site - This is an error
• Other links, such as bread crumbs or links within page, point correctly to d8t2
• I have not found a "rebuild menu" link in standard drupal
• Drush cache-rebuild solves problem

Proposed resolution

Determine why main links are updated and toolbar links are not. The inconsistency is a problem in itself
Edit documentation about site copying if toolbar can't be fixed

Remaining tasks

(reviews needed, tests to be written or run, documentation to be written, etc.)

User interface changes

(New or changed features/functionality in the user interface, modules added or removed, changes to URL paths, changes to user interface text.)

API changes

(API changes/additions that would affect module, install profile, and theme developers, including examples of before/after code if appropriate.)

Data model changes

(Database or configuration data changes that would make stored data on an existing site incompatible with the site's updated codebase, including changes to hook_schema(), configuration schema or keys, or the expected format of stored data, etc.)

Original report by [username]

(Text of the original report, for legacy issues whose initial post was not the issue summary. Use rarely.)