[fractal] (2 commits) Non-fast-forward update to branch split-main-stack

[Alejandro Domínguez <aledomu src gnome org>]

The branch 'split-main-stack' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  94c3cec... Split main_stack in login and sessions

Commits added to the branch:

  9636f74... login: add specific error logins based on login with passwo (*)
  a50d35c... Split main_stack in login and sessions

(*) This commit already existed in another branch; no separate mail sent