This changeset removes all instances of `_wp_http_referer` variable from the URL when creating a hidden input for `_wp_http_referer`. It prevents the hidden field from having an additional version of `_wp_http_referer` each time the form is submitted.
Props msolution, justinahinon, pbearne, mikeschroder, mukesh27, audrasjb, Clorith, chaion07, robinwpdeveloper, hztyfoon, davidbaumwald, costdev, adamsilverstein.
Fixes#54106.
git-svn-id: https://develop.svn.wordpress.org/trunk@54449 602fd350-edb4-49c9-b593-d223f7449a82