Fixed problem that redirect does not work when placed in subdirectory.

[ytetsuro]

When I set CodeIgniter in the following URL, redirect expects the following behavior.

@link: #1126

baseURL

http://example.com/path/to/codeigniter/

requestURL

http://example.com/path/to/codeigniter/auth/index

Redirect expects

redirect('/auth/login') -> http://example.com/path/to/codeigniter/auth/login
redirect('login') -> http://example.com/path/to/codeigniter/auth/login

but, it became as follows.

Redirect actual

redirect('/auth/login') -> http://example.com/auth/login🙅‍♂️
redirect('login') -> http://example.com/path/to/codeigniter/auth/login🙆‍♂️

[ytetsuro]

sorry this is bad code.