I have created a new redirection testing resource on bioviztest3.bioviz.org in which the password challenge is meant to occur after the redirection response is received by the client.
The Apache configuration file (httpd.conf) contains the following line:
Redirect /bogus/redirect-example /quickload/redirect-example
If a user attempts to retrieve https://bioviztest3.bioviz.org/bogus/redirect-example, then the Apache web server will redirect the client to resource https://bioviztest3.bioviz.org/quickload/redirect-example. This new location contains Apache configuration files that will trigger it to request a user name and a password from the client. The only user name and password combination that it will accept are: "guest2" and "guest2".
The other user name and password combination won't work.
Added new password-protected quickloads to aloraine fork https://bitbucket.org/aloraine/bioviz branch
IGBF-3204.Will submit PR to bioviz and merge.