Table pagination does not respect WP_SITEURL

[anonymized_8193417]

The pagination, such as when you move through multiple pages of posts, uses the requested URL, which does not always match the specified URL in wp-config.
This causes a problem when wordpress is behind a proxy, for instance.

This can be easily fixed.

In wp-admin/includes/class-wp-list-table.php
On line 492:

Change -

$current_url = ( is_ssl() ? 'https://' : 'http://' ) . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];

to-

$current_url = bloginfo('url') . $_SERVER['REQUEST_URI'];

[ocean90]

#19216 (and #18944)