pam authentication (#5303)

* add pam support, without extra column

* bugfixes for pam login

* document options

* fix code style

* fix codestyle

* fix tests

* don't call remember_me without password

* fix codestyle

* improve checks for pam usage (should fix tests)

* fix remember_me part 1

* add remember_token column because :rememberable requires either a password or this column.

* migrate db for remember_token

* move pam_authentication to the right place, fix logic bug in edit.html.haml

* fix tests

* fix pam authentication, improve username lookup, add comment

* valid? is sometimes not honored, return nil instead trying to authenticate with pam

* update devise_pam_authenticatable2 and adjust code. Fixes sideeffects observed in tests

* update devise_pam_authenticatable gem, fixes for codeconventions, fix finding user

* codeconvention fixes

* code convention fixes

* fix idention

* update dependency, explicit conflict check

* fix disabled password updates if in pam mode

* fix check password if password is present, fix templates

* block registration if account is maintained by pam

* Revert "block registration if account is maintained by pam"

This reverts commit 8e7a083d650240b6fac414926744b4b90b435f20.

* fix identation error introduced by rebase

* block usernames maintained by pam

* document pam settings better

* fix code style

1 files changed, 5 insertions, 0 deletions

diff --git a/db/migrate/20180109143959_add_remember_token_to_users.rb b/db/migrate/20180109143959_add_remember_token_to_users.rb
new file mode 100644
index 000000000..662905bcb
--- /dev/null
+++ b/db/migrate/20180109143959_add_remember_token_to_users.rb
@@ -0,0 +1,5 @@
+class AddRememberTokenToUsers < ActiveRecord::Migration[5.1]
+  def change
+    add_column :users, :remember_token, :string, null: true
+  end
+end