chore: merge branch 'xpavlic/unspecified_to_password_contexts' into 'main'

feat: authentication context unspecified to password context to work according to the beyond spec

See merge request !60

lib/AuthSwitcher.php

@@ -44,7 +44,8 @@ class AuthSwitcher
     /**
      * Contexts trusted as password authentication, in the order of preference (for replies).
      */
-    public const PASSWORD_CONTEXTS = [self::REFEDS_SFA, Constants::AC_PASSWORD_PROTECTED_TRANSPORT];
+    public const PASSWORD_CONTEXTS = [self::REFEDS_SFA, Constants::AC_PASSWORD_PROTECTED_TRANSPORT,
+        Constants::AC_UNSPECIFIED];
 
     public const ERROR_STATE_ID = 'authswitcher_error_state_id';