Splitting from T124453: Meta login fails.
Steps to reproduce:
- in an incognito browser (I used current Chrome) visit wikisource.org
- log in
- log out
- log in again
Login fails and you get an error about lack of cookie support (nocookieslogin - ie. LoginForm::hasSessionCookie() is failing). Further login attempts give the same error until cookies are cleared. Could not reproduce on any other site. (Of course it can't be reproduced anywhere now the SessionManager has been rolled back.)